Snapper Lawn Mower C216012RV User Manual

Safety Instructions & Operator’s Manual for

21” STEEL DECK

WALK MOWERS

COMMERCIAL MODEL

SERIES 12

PUSH

MODELS

PROPELLED

MODELS

C216012RV CP214012R2

CP216012RV

CP216512RV

CP215512KWV

MODEL NUMBER EXPLANATION

MODEL DESIGNATION

SELF-PROPELLED

CUTTING WIDTH

ENGINE OPTIONS

ENGINE TYPE

SERIES DESIGNATION

ENGINE HORSE POWER

C – Commercial Model

21 – 21” Cutting Width

P – Self Propelled Model

12 - Series Designation

KW – Kawasaki Engine

R – Robin Engine

40 – 4.0 HP (Engine Horse Power)

60 – 6.0 HP (Engine Horse Power)

55 – 5.5 HP (Engine Horse Power)

65 – 6.5 HP (Engine Horse Power)

V – Over Head Valve Engine

2 – 2 Cycle Engine

Thank you for buying a SNAPPER Product! Before operating your Walk Behind, read this manual carefully and pay

particular attention to the “IMPORTANT SAFETY INSTRUCTIONS” on Pages 2 & 3. Remember that all power equipment

can be dangerous if used improperly. Also keep in mind that SAFETY requires careful use in accordance with the

operating instructions and common sense.

SNAPPER INC.

MANUAL No. 3-5725 (REV. 2, 9/2/99)

IMPORTANT SAFETY INSTRUCTIONS

OPERATION

MAINTENANCE AND STORAGE

1. DO NOT put hands or feet near or under rotating

parts. Keep clear of discharge area while engine is

running.

1. DO NOT store mower or fuel container inside

where fumes may reach an open flame, spark or

pilot light such as in a water heater, furnace,

clothes dryer or other gas appliance. Allow

engine to cool before storing machine in an

enclosure. Store fuel container out of reach of

2. STOP engine when crossing gravel drives, walks, or

roads, and under any conditions where thrown

objects might be a hazard.

3. Mow only in daylight or good artificial light.

4. DO NOT operate mower while under the influence of

alcohol or drugs.

5. After striking a foreign object or if mower vibrates

abnormally, STOP the engine, disconnect and secure

spark plug wire. Inspect the mower for any damage

and repair the damage.

6. DO NOT mow near drop offs, ditches or

embankments. Operator could lose footing or

balance.

7. STAY ALERT for holes and other hidden hazards.

Tall grass can hide obstacles. Keep away from

ditches, washouts, culverts, fences and

protruding objects.

children in

building.

well ventilated, unoccupied

2. Keep mower and engine free of grass, leaves or

excess grease to reduce fire hazard and engine

overheating.

3. When draining fuel tank, drain fuel into an

approved container outdoors and away from

open flame.

4. Keep all bolts, especially blade bolts, nuts and

screws properly tight. Check that all cotter pins

are in proper position.

5. Always provide adequate ventilation when

running engine. Engine exhaust gases contain

carbon monoxide, a deadly poison.

8. DO NOT mow on wet grass. Always be sure of

your footing. Keep a firm hold on the handle and

walk, never run. Slipping could cause injury.

9. DO NOT leave the machine with the engine

running. STOP BLADE and STOP ENGINE before

leaving the operators position for any reason.

10. Before cleaning, repairing or inspecting make

certain engine, blade and all moving parts have

STOPPED. Disconnect and secure spark plug

wire away from plug to prevent accidental

starting.

6. Service engine and make adjustments only when

engine is stopped. Removed spark plug wire

from spark plug and secure wire away from

spark plug to prevent accidental starting.

7. DO NOT change engine governor speed settings

or overspeed engine.

8. Check grass bag assembly frequently for wear or

deterioration to avoid thrown objects and

exposure to moving parts. Replace with new bag

if loose seams or tears are evident. Replace

slider or bag adapter if broken or cracked.

9. Mower blades are sharp and can cut. Wrap the

blades or wear heavy leather gloves and use

CAUTION when handling them.

11. STOP engine and wait until the blade comes to

complete STOP before removing grass bag

and/or clearing grass.

12. DO NOT operate mower without the entire grass

catcher or guards in place. DO NOT point

discharge at people, passing cars, windows or

doors.

13. Slow down before turning.

14. Watch out for traffic when near or crossing

roadways.

15. DO NOT operate engine in enclosed areas.

Engine exhaust gases contain carbon monoxide,

a deadly poison.

10. DO NOT test for spark by grounding spark plug

next to spark plug hole; spark plug could ignite

gas exiting engine.

11. Have machine serviced by an authorized

SNAPPER dealer at least once a year and have

the dealer install any new safety devices.

12. Use only genuine SNAPPER replacement parts to

assure that original standards are maintained.

TABLE OF CONTENTS

IMPORTANT SAFETY INSTRUCTIONS................................................2-3

TABLE OF CONTENTS ............................................................................ 4

SECTION 1 - FAMILIARIZATION.............................................................. 5

SECTION 2 - OPERATING INSTRUCTIONS.........................................6-8

Pre-start Checklist ............................................................................................... 6

Starting & Stopping Engine & Blade.................................................................. 6

Starting & Stopping Wheel Drive ....................................................................... 7

Handle Height Adjustment.................................................................................. 7

Cutting Height Adjustment ................................................................................ .7

Recycling Operation............................................................................................ 8

Installation of Grass Catcher.............................................................................. 8

SECTION 3 - MAINTENANCE INSTRUCTIONS..................................9-12

Change Engine Oil............................................................................................... 9

Check Transmission Grease............................................................................. 10

Check Mower Blade........................................................................................... 10

Check Engine Drive Belt ................................................................................... 10

Check Transmission Poly-V Belt...................................................................... 10

Service – Annually ............................................................................................. 11

Engine.............................................................................................................. 11

Air Filter ........................................................................................................... 11

Engine Oil........................................................................................................ 11

Storage Procedure............................................................................................. 11

SECTION 4 - ADJUSTMENTS AND REPAIR....................................12-18

Mower Blade Replacement ............................................................................... 12

Blade Sharpening .............................................................................................. 12

Wheel Drive Control Adjustment...................................................................... 13

Driven and Drive Disc Service..................................................................... 13-17

Cleaning Drive Disc and Driven Disc............................................................ 14

Drive Spring Repair/Replacement................................................................. 14

Driven Disc Adjustment ............................................................................ 14-15

Driven Disc Replacement.......................................................................... 15-16

Driven Disc Bearing Replacement................................................................ 16

Hex Shaft Bearing Replacement ................................................................... 17

Belt Service ................................................................................................... 17-18

Engine Drive Belt Replacement ............................................................... 17-18

Transmission Poly-V Belt Replacement....................................................... 18

TROUBLESHOOTING ............................................................................ 19

SERVICE SCHEDULE ............................................................................ 20

Maintenance/Replacement Parts...................................................................... 20

WARRANTY............................................................................................ 21

PRIMARY MAINTENANCE ................................................................22-25

Section 1 - FAMILIARIZATION

ENGINE

SPEED

DECAL

WHEEL DRIVE

CONTROL

WHEEL DRIVE CONTROL -

RELEASE TO STOP

FORWARD MOTION

BLADE CONTROL -

RELEASE TO STOP

BLADE AND ENGINE

ENGINE SPEED

CONTROL

“CHOKE”

“FAST”

BLADE

CONTROL

GROUND

SPEED

CONTROL

FAST

SPEED

CONTROL

“SLOW”

ENGINE

SPEED

CONTROL

SLOW

UPPER

HANDLE

ROPE START HANDLE

FUEL FILLER CAP

BAG

SLIDER

MID

HANDLE

OIL FILL CAP &

DIPSTICK

GRASS

BAG

KAWASAKI 4-CYCLE

OHV ENGINE

LOWER

HANDLE

REAR HEIGHT

ADJUSTMENT LATCH

MUFFLER

CATCHER MODEL SHOWN

(ROPE START MOUNTED ON

LEFT SIDE OF HANDLE)

GRASS BAG

CONNECTOR

FRONT HEIGHT

ADJUSTING LATCH

ENGINE AIR

BREATHER COVER

BAG ADAPTER

MOWER DECK

FIGURE 1.1

1.1 INTRODUCTION

1.2 NOMENCLATURE

This manual has been prepared for the operators of

the SNAPPER WALK BEHIND MOWERS. Its

purpose, aside from recommending operating and

routine service requirements, is to promote safety

through the use of accepted operating practices.

Read, Understand and Follow the “IMPORTANT

SAFETY INSTRUCTIONS” on Pages 2 & 3 of this

manual and all safety messages on the mower and

attachments before operating the mower.

The nomenclature drawing above, Figure 1.1,

shows the essential parts of the SNAPPER WALK

BEHIND MOWERS. It is recommended that all

operators of the mower become thoroughly familiar

with the controls, parts and operation of the mower

before operating. Specific details involving the

engine are found in the separate engine owner’s

manual. Study these manuals before operating and

keep both handy for future reference.

Section 2 - OPERATING INSTRUCTIONS

2.1 PRE-START CHECK LIST

2.1.6. Clean exterior surfaces of cutting deck and

Make the following checks and perform the service

required before each start-up.

2.1.1. Check guards, deflectors, grass bag, adapter

and covers to make sure all are in place and securely

tightened.

engine of any accumulation of spilled fuel, dirt,

grass, oil, etc. Keep engine air intake screen and

cooling fins clear at all times.

2.2 STARTING & OPERATION

2.2.1. ENGINE & BLADE

2.1.2. Check blade control and wheel drive control

to insure they work freely. See Figure 2.1.

1. Move engine speed control to the “choke”

position. See Figure 2.3.

WHEEL DRIVE

CONTROL

NOTE: Stop the engine (and blade) by releasing the

BLADE

CONTROL

blade control.

CATCHER MODEL SHOWN

(ROPE START MOUNTED ON

LEFT SIDE OF HANDLE)

BLADE

CONTROL

FIGURE 2.1

WHEEL DRIVE

CONTROL

2.1.3. Check cutting height. Adjust to desired

height.

2.1.4. Check engine oil and add oil as needed to

bring level up to the full mark. Refer to Engine Owner’s

Manual for oil specifications. See Figure 2.2.

ENGINE SPEED CONTROL

(SHOWN IN CHOKE POSITION)

FIGURE 2.3

2. Pull blade control against handle.

3. Pull rope start handle to crank engine.

4. After engine starts, move engine speed control

away from the choke position to the “Fast” (Rabbit)

position. See Figure 2.3.

FULL MARK

(DO NOT OVER FILL)

5. Allow a brief warm-up until engine runs smooth.

FIGURE 2.2

2.1.5. Add fuel to tank after pushing the mower

outside where fumes can safely dissipate. Make

sure cap is tightened after refueling. Refer to

Engine Owners Manual for specifications.

Section 2 - OPERATING INSTRUCTIONS

2.2.2. PROPELLING MOWER

2. Move upper mower handle up or down until the

desired position is achieved.

(Self Propelled Models)

1. Move ground speed control to the desired

speed position. See Figure 2.4.

3. Tighten the lower nuts on each lower handle to

maintain desired position.

2. Move wheel drive control against handle to

engage wheel drive and propel mower forward.

Forward speed can be adjusted while the mower is

moving by changing position of the ground speed

control. See Figure 2.4.

WARNING

STOP engine and mower blade by releasing the

blade control before adjusting cutting height or

handle height.

MOVE CONTROL

MOVE GROUND

AGAINST HANDLE

SPEED CONTROL

TO DESIRED

POSITION

(FAST)

SIXTH SPEED

POSITION

TO ENGAGE

WHEEL DRIVE

2.5 CUTTING HEIGHT ADJUSTMENT

1. Pull the height adjusting latch outward and

move to desired cutting height. See Figure 2.6.

LOWEST CUTTING

SIXTH

LATCH

HEIGHT

WHEEL DRIVE

CONTROL

FIRST

BLADE

CONTROL

(SLOW)

FIRST SPEED

POSITION

FIGURE 2.4

HIGHEST

CUTTING

HEIGHT

2.3 STOPPING

Stop engine and blade by releasing the blade

control. Stop forward motion of mower by releasing

the wheel drive control.

FIGURE 2.6

2.4 HANDLE HEIGHT ADJUSTMENT

The height of the mower handle can be adjusted

as follows:

2. Set all wheels at the same cutting height. The

highest cutting position is Notch 6. The lowest

cutting position is Notch 1. See Figure 2.7.

1. Loosen the nuts on each lower handle as

shown in Figure 2.5.

HIGHER

LOWER

HANDLE

LATCH

POSITIONS

LOWER

CUTTING HEIGHT SETTINGS

LOOSEN LOWER

NUTS ON EACH

LOWER HANDLE

FIGURE 2.7

FIGURE 2.5

Section 2 - OPERATING INSTRUCTIONS

HOOK BAG

WARNING

HANDLE OVER

LOWER HANDLES

DO NOT attempt any maintenance, adjustments or

service with engine and blade running. STOP

engine and blade. Disconnect spark plug wire and

secure away from spark plug. Engine and

components are HOT. Avoid serious burns, allow

sufficient time for all components to cool. Wear

heavy leather gloves when handling or working

around cutting blades. Blades are extremely sharp

and can cause severe injury.

2.6 RECYCLING OPERATION - OPTIONAL

ACCESSORY

Recycling operation requires optional accessory.

SLIDE CONNECTOR

OVER END OF

ADAPTER FLANGE

NOTE: For best recycling results, cut up to a maximum

of 1/3 of grass blade length and recycle ONLY when

grass is dry.

FIGURE 2.9

1. Set all wheels in the highest cutting position

(Notch 6).

WARNING

2. Move engine speed control to “FAST” (Rabbit)

position.

3. Move ground speed control to slowest speed

setting.

4. Proceed mowing slowly. If grass is very dense,

lower each rear wheel latch one notch lower than

the front wheel latches to improve recycling

performance.

DO NOT operate without entire Grass Catcher or

guard in place. Grass Catcher components are

subject to deterioration during normal use. Inspect

frequently and replace worn or damaged

components immediately.

2.7 INSTALLATION of GRASS CATCHER

Position grass bag between handles. See Figure 2.8.

Install grass catcher by sliding connector over flange

of adapter. Attach grass bag hooks over middle

handle cross bar. See Figure 2.9.

LOWER HANDLES

HANDLE

BAG CONNECTOR

ADAPTER

FLANGE

FIGURE 2.8

Section 3 - MAINTENANCE

IMPORTANT: DO NOT tip machine with carburetor or

spark plug down. Oil from crankcase will saturate the air

filter and cause the engine to be hard to start or not start

at all. If contamination does occur, the air filter will have

to be replaced.

3.1 INTRODUCTION

To retain the quality of the mower, use genuine

SNAPPER replacement parts only. Contact a local

SNAPPER dealer for parts and service assistance.

For the correct part or information for a particular

mower, always mention model and serial number.

(KAWASAKI ENGINES)

3.2 SERVICE - AFTER FIRST 5 HOURS

3.2.1. CHANGE ENGINE OIL

1. The items needed to perform oil change are:

cloth rags, (1) 24” long plastic hose and (1) 2 quart

shallow pan.

2. Tilt mower on its left wheels and place blocks

under the right wheels. See Figure 3.1.

3. Attach plastic hose over end of nipple on oil

drain plug and allow opposite end to lay in pan.

4. Using a wrench, turn oil drain plug counter

clockwise until oil drains freely from engine into pan.

WARNING

DO NOT attempt any maintenance, adjustments or

service with engine and blade running. STOP

engine and blade. Disconnect spark plug wire and

secure away from spark plug. Engine and

components are HOT. Avoid serious burns, allow

sufficient time for all components to cool. Wear

heavy leather gloves when handling or working

around cutting blades. Blades are extremely sharp

and can cause severe injury.

NOTE: Check specific model engine owner’s

manual for changing engine oil procedure.

KAWASAKI ENGINE SHOWN

OIL

FILTER

(ROBIN ENGINES)

1. Refer to Engine Manual for proper oil

specifications and procedures.

2. For simplest/cleanest oil change, loosen lower

handle wing nuts and stand mower up on lower

handle as shown in Figure 3.1. Drain oil through

dipstick tube into a container.

OIL DRAIN

PLUG

NIPPLE

ATTACH HOSE TO

END OF DRAIN

NIPPLE

FIGURE 3.1

5. Retighten oil drain after oil has completely

drained from engine. Remove plastic hose. Wipe

up any spilled oil. Dispose of oil properly.

6. Place cloth underneath oil filter. Remove oil

filter and filter gasket. Wipe up any spilled oil.

7. Install new oil filter and filter gasket.

NOTE: Correct oil filter and filter gasket specified

in Engine Owner’s Manual.

8. Fill engine with oil as specified in Engine

Owner’s Manual. Thereafter, change oil after each

25 hours of use.

FIGURE 3.1

Section 3 – MAINTENANCE

3.2.2. CHECK GREASE LEVEL IN TRANSMISSION

WARNING

DO NOT attempt any maintenance, adjustments or

service with engine and blade running. STOP

engine and blade. Disconnect spark plug wire and

secure away from spark plug. Engine and

components are HOT. Avoid serious burns, allow

sufficient time for all components to cool. Wear

heavy leather gloves when handling or working

around cutting blades. Blades are extremely sharp

and can cause severe injury.

1. Roll machine and remove transmission fill plug.

See Figure 3.2.

FILL PLUG

3.2.3 CHECK MOWER BLADE

1. Disconnect spark plug wire and secure end

away from plug.

2. Tilt mower up on its rear wheels for access to

the blade cap screw. Do not tilt mower with spark

plug or carburetor down. See Figure 3.4.

3. Check torque of blade retaining cap screw.

Recommended torque should be 30 to 40 ft. lbs.

See Figure 3.4.

4. Check blade for sharpness, wear and damage.

Refer to Section “Blade Wear Limits”.

FIGURE 3.2

2. Look into plug hole. If liquid grease IS NOT

visible on the input gear (the small gear below the

plug hole), add an amount, to cover gear, of

Snapper “00” grease. See Figure 3.2.

3.2.4 CHECK ENGINE DRIVE BELT

1. Visually check engine drive belt for cracking,

fraying, severed or belt strands exposed. If worn or

damaged, replace belt before operating mower.

NOTE: Snapper “00” Grease (Part No. 2-9443) is

available at your SNAPPER dealer. Do not spill grease or

oil on surface of drive disc. See Figure 3.3.

3.2.5 CHECK TRANSMISSION POLY-V BELT

1. Visually check poly-v belt for cracking, fraying,

severed or belt strands exposed. If worn or

damaged, replace belt before operating mower.

3. Reinstall transmission plug.

4. Check grease level after each 25 hours of

operation.

RECOMMENDED

BLADE RETAINING

CAP SCREW

TORQUE VALUE

SHOULD BE 30 TO

40 FT. LBS.

KEEP DRIVE

DISC CLEAN !

FIGURE 3.4

FIGURE 3.3

Section 3 - MAINTENANCE

WARNING

DO NOT attempt any maintenance, adjustments or

service with engine and blade running. STOP engine

and blade. Disconnect spark plug wire and secure

away from spark plug. Engine and components are

HOT. Avoid serious burns, allow sufficient time for

all components to cool. Wear heavy leather gloves

when handling or working around cutting blades.

Blades are extremely sharp and can cause severe

injury.

3.3 SERVICE - ANNUALLY

Perform all maintenance as described in the “Service

Schedule” section of this manual.

3.3.1. Engine

Service engine according to engine owner’s manual.

3.3.2. Air Filter

Refer to engine owner’s manual for service

instructions.

3.3.3. Engine Oil

Refer to engine owner’s manual for service

instructions.

3.4 STORAGE PROCEDURE

Refer to the Engine Owner’s Manual for directions

regarding engine storage preparations. Prepare the

mower for “end of season” storage as follows:

1. Drain fuel from fuel tank and let engine run until

all fuel is out of the carburetor.

2. Disconnect and remove the spark plug wire

away from spark plug before any other

preparations are made!

3. Tape all openings closed to prevent spraying

water into exhaust or air intakes during washing.

4. Tilt mower up on its rear wheels and thoroughly

clean the underside of the deck. Do not tilt mower

with spark plug or carburetor down. Scrape away

any accumulation of grass with a putty knife and or

wire brush.

5. Lubricate all exposed metal with a light coating

of oil to prevent corrosion.

6. On self-propelled models disconnect transfer rod

clip and remove ground speed control rod before

folding handles.

7. Loosen handle knobs. Carefully fold the handles

forward, “flexing” the control cables to prevent cable

damage.

8. Store the mower in a shed or other dry area,

protected from weather.

Section 4 - REPAIR & ADJUSTMENTS

MAKE SURE THAT

BLADE HUB IS

SEATED

BETWEEN

FLANGES

WARNING

DO NOT attempt any maintenance, adjustments or

service with engine and blade running. STOP

engine and blade. Disconnect spark plug wire and

secure away from spark plug. Engine and

components are HOT. Avoid serious burns, allow

sufficient time for all components to cool. Wear

heavy leather gloves when handling or working

around cutting blades. Blades are extremely sharp

and can cause severe injury.

BLADE

HUB

FLANGE

BLADE

4.1 MOWER BLADE REPLACEMENT

4.1.1. STANDARD BLADE WEAR LIMIT

1. Inspect blade frequently for signs of excessive

wear or damage. See Figure 4.1.

CONE WASHER

(Concave Side Up)

CAPSCREW

NEW BLADE

FIGURE 4.2

WEAR LIMIT

(NOTCH STARTS)

4. Sharpen blade on a grinding wheel at an angle

of 22 to 28 degrees. DO NOT sharpen blade

beyond original cutting edge. See Figure 4.3.

DANGEROUS

CONDITION !

DO NOT USE ON

MOWER !

REPLACE WITH NEW

BLADE.

DO NOT SHARPEN

BEYOND ORIGINAL

CUTTING EDGE

22-28º

BLADE TIP

END VIEW OF

BLADE ASSEMBLY

FIGURE 4.1

ORIGINAL CUTTING EDGE

2. Replace the blade if it is badly chipped, bent,

noticeably out of balance or has cracks or notch in

either tip. See Figure 4.1. Replace with new blade.

FIGURE 4.3

5. Check blade for balance. If necessary, correct

balance by grinding heavy end of blade.

6. Reinstall blade. See Figure 4.1. Check torque

of blade retaining cap screw. Recommended

torque should be 30 to 40 ft. lbs.

WARNING

DO NOT use a cutting blade that shows signs of

excessive wear or damage. Refer to Section

“MOWER BLADE REPLACEMENT” for proper blade

inspection and service procedures.

4.1.2. BLADE SHARPENING

1. Disconnect spark plug wire and secure end

away from plug.

2. Tilt mower up on its rear wheels. Do not tilt

mower with spark plug or carburetor down.

3. Remove blade. See Figure 4.2.

Section 4 - REPAIR & ADJUSTMENTS

4. If the wheel drive control fails to return quickly to

WARNING

the “OFF” position when released, check for

binding at the cable clips located on the side of the

right handle. The upper clip should be located 2”

below the upper bolt; the lower clip should be 4”

above the lower bolt. The cable should slide freely

with the clips installed at these locations.

DO NOT attempt any maintenance, adjustments or

service with engine and blade running. STOP

engine and blade. Disconnect spark plug wire and

secure away from spark plug. Engine and

components are HOT. Avoid serious burns, allow

sufficient time for all components to cool. Wear

heavy leather gloves when handling or working

around cutting blades. Blades are extremely sharp

and can cause severe injury.

4.3 DRIVEN DISC SERVICE

If the mower does not propel itself properly, See

Figure 4.5. Check for the following problems:

DRIVEN DISC &

RUBBER RING

NOTE: The following sections 4.2 through

4.4 are for self-propelled models only.

POLY-V-BELT

DRIVE

SPRING

4.2 WHEEL DRIVE CONTROL ADJUSTMENT

1. The wheel drive control is properly adjusted

when there is 1/16” to 1/8” clearance between the

inside of the spring hook and the inside of the

clutch cable eye with the wheel drive control

released. See Figure 4.4.

DRIVE

DISC

CLUTCH CABLE

VINYL SPRING

ENGINE

DRIVE

BELT

1/16” TO 1/8”

CLEARANCE

CLUTCH CABLE

EYE

UPPER

SPRING

FIGURE 4.5

SPRING HOOK

LOWER

SPRING

1. Grease on drive disc causing slippage.

2. Broken or disconnected drive spring.

3. Driven disc is out of adjustment.

4. Driven disc rubber ring is worn – does not

contact drive disc properly.

5. Worn Poly-V Belt or engine drive belt.

CABLE

CLUTCH CABLE EYE

NOTE: If any of the above (1 thru 5) are causing

problems, service as follows:

SPRING

(Continued on next page)

FIGURE 4.4

2. To adjust, unhook upper spring from cable eye

and rotate spring in direction required to extend or

shorten spring length.

3. Rehook upper spring to cable eye and check

clearance. Repeat procedure if required.

NOTE: The vinyl spring cover should be kept over the

spring at all times except for adjustments.

Section 4 - REPAIR & ADJUSTMENTS

4.3.3. DRIVEN DISC ADJUSTMENT

WARNING

If the drive disc and driven disc are clean and the

mower drive is still slipping, adjust the driven disc

as follows:

1. Place ground speed control in the number six

speed position. See Figure 4.7.

DO NOT attempt any maintenance, adjustments or

service with engine and blade running. STOP

engine and blade. Disconnect spark plug wire and

secure away from spark plug. Engine and

components are HOT. Avoid serious burns, allow

sufficient time for all components to cool.

MOVE GROUND SPEED

CONTROL TO SIXTH

SPEED POSITION

(FAST)

SIXTH SPEED

POSITION

4.3.1. Cleaning Drive Disc & Driven Disc.

If oil or grease on the drive disc or driven disc is

causing slippage, clean discs as follows:

1. Wipe away any oil or grease with a clean cloth.

2. Use either an approved grease solvent or hot,

soapy water to clean drive disc or driven disc.

3. Rinse components with clean water.

SIXTH

GROUND

SPEED

CONTROL

4. Dry components with a clean cloth.

FIRST

4.3.2. Drive Spring Repair/Replacement

If drive spring is loose, reconnect as shown in

Figure 4.6. If spring is broken, replace with new

spring.

(SLOW)

FIRST SPEED

POSITION

FIGURE 4.7

IMPORTANT: If machine drive system continues

slipping see Trouble Shooting section.

2. Remove driven disc spring from driven disc

assembly. Remove transfer rod connector nut and

remove ball joint/transfer rod from driven disc

assembly anchor point. See Figure 4.8.

USE NEEDLE NOSE

PLIERS TO INSTALL

DRIVE SPRING

DRIVEN DISC

ASSEMBLY

DRIVE

DISC

DRIVE

SPRING

DRIVEN DISC

SPRING

BALL JOINT

ANCHOR

POINT

TRANSFER ROD

CONNECTOR

NUT

FIGURE 4.8

FIGURE 4.6

(Continued On Next Page)

Section 4 - REPAIR & ADJUSTMENTS

4.3.4. Replacing Driven Disc Rubber Ring

WARNING

If the rubber ring is badly chunked or worn down to

within 1/16” of the metal rim of the driven disc hub,

it must be replaced. Install new rubber ring as

follows:

1. Using a small flat blade screwdriver, free the

clip from the transfer rod. Then remove the

transfer rod from the clip and the speed control rod.

See Figure 4.10.

DO NOT attempt any maintenance, adjustments or

service with engine and blade running. STOP

engine and blade. Disconnect spark plug wire and

secure away from spark plug. Engine and

components are HOT. Avoid serious burns, allow

sufficient time for all components to cool.

3. Slide driven disc assembly over to 1/8” from

outside edge of drive disc. Maintaining the 1/8”

measurement, remove any misalignment from the

transfer rod linkage and the driven disc assembly

anchor point. This can be done by loosening nut and

rotating the transfer rod ball joint clockwise on the

transfer rod until alignment with the driven disc

assembly anchor point is achieved. Retighten ball

joint nut. Insert ball joint into anchor point and reinstall

the connector hex nut and tighten securely. See

Figure 4.9. Move ground speed control to the first

speed position, then back to the sixth speed position.

Recheck the 1/8” measurement described previously.

Reinstall driven disc spring to driven disc assembly.

CONNECTOR

CLIP

TRANSFER

ROD

SPEED CONTROL

ROD

1/8” MEASUREMENT TO

OUTSIDE EDGE OF DRIVE

SLIDE DRIVEN

DISC

DISC ASSEMBLY

DRIVE

TOWARD

DISC

OUTSIDE EDGE

FIGURE 4.10

TRANSFER

ROD

CONNECTOR

HEX NUT

OUTSIDE

EDGE

ROTATE BALL JOINT

CLOCKWISE

FIGURE 4.9

Section 4 - REPAIR & ADJUSTMENTS

4.3.5. Replacing Bearing In Driven Disc

WARNING

If the driven disc bearing fails, remove the driven

disc assembly and replace bearing as follows:

1. Remove snap ring. See Figure 4.13.

DO NOT attempt any maintenance, adjustments or

service with engine and blade running. STOP

engine and blade. Disconnect spark plug wire and

secure away from spark plug. Engine and

components are HOT. Avoid serious burns, allow

sufficient time for all components to cool.

THRUST

SHIM

PLATE

WASHER

SNAP

RING

4.3.4. Replacing Driven Disc Rubber Ring

(Continued From Previous Page)

2. Using needle nose pliers, unhook the drive

spring and slide the driven disc assembly off the

hex shaft. See Figure 4.11.

3. Remove the five machine screws and plate

which secure the rubber ring to the driven disc

hub. See Figure 4.12.

BEARING

REMOVE FOUR

MACHINE SCREWS

DRIVEN

DISC HUB

RUBBER

DISC

DRIVEN DISC

4. Install new rubber ring.

5. Reverse above procedures for reassembly and

installation.

PLATE

FIGURE 4.13

2. Slide the hub assembly out of the bearing.

3. Remove the four screws.

4. Remove bearing and replace with new bearing.

5. Reassemble components in reverse order.

DRIVEN DISC

ASSEMBLY

FIGURE 4.11

DRIVEN DISC HUB

MACHINE

SCREWS

RUBBER

RING

PLATE

FIGURE 4.12

Section 4 - REPAIR & ADJUSTMENTS

4.4. BELT SERVICE

WARNING

On these mowers, the engine belt transmits power

from engine to drive disc. The drive disc powers

the poly-v belt which engages the transmission

that powers the rear wheels. Should these belts

become worn, they could cause slippage which

would impair mower performance. The condition of

the engine belt and poly-v belt should be checked

after every 25 hours of mower operation.

DO NOT attempt any maintenance, adjustments or

service with engine and blade running. STOP

engine and blade. Disconnect spark plug wire and

secure away from spark plug. Engine and

components are HOT. Avoid serious burns, allow

sufficient time for all components to cool.

4.3.6. Replacement Of Bearing On Pulley End Of

Hex Shaft

To replace the bearing on the pulley end of the hex

shaft, proceed as follows:

1. Hold the hex shaft with an adjustable wrench

held next to the pulley.

4.4.1. Engine Drive Belt Replacement

1. Empty the fuel tank.

2. Unhook the idler spring from the right rear

wheel bracket. See Figures 4.15 and 4.16.

RIGHT REAR

WHEEL BRACKET

2. Remove the 3/8” hex lock nut which is located

on the outside of the right wheel bracket. See

Figure 4.14.

3. Remove holder, O-ring and bearing.

4. Install new bearing.

IDLER

SPRING

IDLER

SLOT IN

DECK

ARM

5. Carefully install new O-ring over the outside of the

new bearing.

6. Install bearing holder and secure with screws.

7. Install 3/8” hex lock nut.

DRIVE DISC

DRIVE BELT

ENGINE DRIVE PULLEY

TOP VIEW OF ENGINE BELT ROUTING

FIGURE 4.15

BALL BEARING

IMPORTANT: DO NOT tip machine with carburetor or

spark plug down. Oil from crankcase will saturate the air

filter and cause the engine to be hard to start or not start

at all. If contamination does occur, the air filter will have

to be replaced.

“O” RING

3/8”

LOCK NUT

3. Remove the driven disc. Refer to Section on

“Replacing Driven Disc Rubber Ring” for driven

disc removal procedure.

4. Do not tilt mower with spark plug or carburetor

down. Tilt mower up on its rear wheels and remove

blade and blade hub. Assistance from another

person may be necessary to hold mower in the

tilted position.

BALL BEARING

HOLDER

FIGURE 4.14

(Continued On Next Page)

Section 4 - REPAIR & ADJUSTMENTS

WARNING

DO NOT attempt any maintenance, adjustments or

service with engine and blade running. STOP

engine and blade. Disconnect spark plug wire and

secure away from spark plug. Engine and

components are HOT. Avoid serious burns, allow

IDLER

SPRING

sufficient time for all components to cool.

RIGHT WHEEL

BRACKET

4.4.1. Engine Drive Belt Replacement

(Continued From Previous Page)

5. Hold the slotted end of the drive disc bolt with a

screwdriver and remove the nut and internal tooth lock

washer. See Figure 4.16.

PULL SPRING THROUGH

LARGE HOLE & HOOK

INTO SMALL HOLE

DRIVE

DISC

FIGURE 4.17

SLOT IN END

POSITION SCRAPER

OF DRIVE

4.4.2. Transmission Poly-V Belt Replacement

1. Remove the driven disc. Refer to Section

Replacing Driven Disc Rubber Ring” for procedure.

4. Note the routing of the old belt around the

three pulleys before removing it. See Figure 4.18.

TO CLEAR “V” OF

DISC BOLT

PULLEY

BUSHING

IDLER

DIFFERENTIAL

PULLEY

BRACKET

IDLER

DRIVE

ARM

PULLEY

POLY-V

BELT

BOLT

RETAINER

IDLER

SPRING

INTERNAL TOOTH

LOCKWASHER

HEX SHAFT

DECK BRACKET

(PARTIALLY

SHOWN)

NUT

FIGURE 4.16

6. Lift the drive disc off the idler arm and remove worn

belt.

7. Loop one end of new belt over engine pulley and

insert the other end through slot in deck. See Figure

4.16.

DRIVEN

PULLEY

BELT GUIDE

8. Loop the belt around the pulley on the bottom of the

drive disc.

ROUTING OF POLY-V BELT

9. Reinstall drive disc and retaining hardware.

10. Align bushing in bracket and drive disc.

11. Reinstall blade hub and cutter blade. Recom-

mended torque for blade cap screw is 30 to 40 ft. lbs.

13. Use a stiff wire, such as a coat hanger, with a hook

fashioned on one end to pull the hooked end of the

idler spring through the large hole in the right wheel

bracket. See Figure 4.17.

FIGURE 4.18

5. Place new Poly-V Belt over end of hex shaft

and onto driven pulley.

6. Work belt onto top of idler pulley.

7. Twist belt sideways and pull it upward between

the differential bracket and drive pulley and then

down into the pulley groove. Make sure the Poly-V

Belt is above belt guide. See Figure 4.18.

14. Reinstall the driven disc assembly.

TROUBLESHOOTING

PROBLEM

PROBABLE CAUSE

CORRECTIVE ACTION

1. Fill fuel tank with fresh fuel.

Engine Will Not Start 1. Fuel tank empty.

Using Recoil Starter 2. Engine needs choking or priming.

2. Choke/Prime. Check Engine Manual for

Instructions.

3. Spark plug wire disconnected.

3. Place spark plug wire onto spark plug.

Engine Stalls or Stops 1. Blade control is released or is not being held securely 1. Blade control should be held securely against

After Running

against handle.

handle at all times during operation of mower.

2. Choke control in the “CHOKE” position.

2. Move choke control to “OFF” position.

3. Fuel tank empty.

3. Fill with fuel to proper level.

4. Clean free of all debris.

5. Service spark plug.

4. Engine air pre-cleaner and or air cleaner dirty.

5. Spark plug defective or gap set improperly.

6. Water, debris or stale fuel in fuel system.

6. Drain and clean fuel system.

1. Clean or replace filters.

Engine Loses Power 1. Engine air pre-cleaner or air cleaner dirty

2. Spark plug faulty.

2. Service spark plug.

3. Water, debris or stale fuel in fuel system.

3. Drain and clean fuel system.

Excessive Vibration 1. Damaged, out of balance or bent mower blades.

2. Loose blade components.

1. Service mower blade(s).

2. Service and tighten loose parts.

3. Replace air lifts. Tighten to proper torque.

4. Replace belt.

3. Loose or missing air lift (if equipped).

4. Lumpy or frayed belt

5. Bent Idler pulley

5. Replace pulley.

1. Damaged transmission

2. Traction drive belt requires replacement

3. Driven disc slipping

Mower Will Not Move

Loss Of Traction

(Self-Propelled Models)

1. Contact authorized SNAPPER dealer.

2. Replace traction drive belt.

3. Clean or replace driven disc.

1. Cutting height too low or high.

2. Engine speed too slow.

1. Adjust cutting height.

Cutting Grass

Improperly

2. Move engine speed control to “FAST” position.

3. Move ground speed control to a slower speed.

4. Adjust height of cut with height adjust levers.

5. Adjust height of cut with height adjust levers.

6. Sharpen cutting edges or replace blade(s).

1. Move engine speed control to “FAST” position.

2. Move ground speed control to a slower speed.

3. Mow when grass is dry.

3. Forward ground speed too fast.

4. Terraced cut, side to side.

5. Excessive deck pitch, front to rear.

6. Cutting blade(s) dull or damaged.

1. Engine speed too slow.

Poor Grass Discharge

2. Forward speed too fast.

3. Grass is wet.

4. Excessively worn or damaged blade(s).

5. Build up of grass clippings and debris under deck.

6. Improper blade(s) installed on deck.

7. Blade(s) installed improperly on deck.

1. Leaking engine case.

4. Service mower blade(s)

5. Clean deck.

6. Install proper SNAPPER blades.

7. Install blades properly.

Oil Leaking

1. Contact authorized SNAPPER dealer.

2. Check and tighten drain plug.

3. Make sure dip stick or oil filler cap is securely

in place.

SERVICE SCHEDULE

ITEM

SERVICE PERFORMED

REF.

Page 6

EACH

USE

HRS

100

HRS

EACH

SEASON

Check Oil Level

Engine Oil

Initial Oil Change

Periodic Oil Change

Page 9

Page 10

Clean Sponge Element

Clean or Replace

Replace

Engine Manual

Page 10.

Engine Manual.

Air Pre-Cleaner

Air Cleaner

Spark Plug

Fuel Filter

X**

Engine Manual.

Engine Manual

Replace

Clean Shroud & Fins

Engine Cooling

System

X**

Check For Wear And

Tension

Check For Wear, Damage Page 12

& Replacement

Clean Debris

Accumulation

Page 17-18

Drive Belts

Mower Blades

Mower Deck

Page 6 & 11

Check Grease Level

Pages 10

Transmission

Grease

Periodic Grease Check

Check for Wear Damage Page 13-16

& Replacement

Drive Disc

* Change oil every 25 hours when operating under heavy load or high temperatures.

**Clean more often under dusty conditions or when air debris is present

4.5.

MAINTENANCE/REPLACEMENT PARTS

MAINTENANCE PARTS

Engine Speed Control (Robin 4 Cycle Engines)

Engine Speed Control (Robin 2 Cycle Engines)

Engine Speed Control (Kawasaki Engine)

Blade Control Cable (Robin 4 Cycle Engines)

Blade Control Cable (Robin 2 Cycle Engines)

Blade Control Cable (Kawasaki Engine)

Clutch Pull Cable

3-5854

2-6467

3-5881

2-7393

2-6875

2-5013

1-9795

1-7168

2-6691

2-6407

1-2354

1-2353

2-3364

06145

Cutter Blade (Air Lift Compatible)

Cutter Blade (Mulching)

Cutter Blade (Not Air Lift Compatible)

Cutter Blade (Ninja - Quad Edge)

Wheel Drive Pulley to Transmission Pulley Belt

Engine to Drive Disc Belt

Rubber Drive Tire

Parts Manual for 21” Steel Deck Commercial Model

Walk Behind Mower Series 12

3 YEAR LIMITED WARRANTY

For three (3) years from purchase date for the original purchaser's residential, non-commercial use, SNAPPER, through

any authorized SNAPPER dealer will replace, free of charge (except for taxes where applicable), any part or parts found

upon examination by the factory at McDonough, Georgia, to be defective in material or workmanship or both.

For two (2) years from purchase date for the original purchaser's commercial, rental, or other non-residential use,

SNAPPER, through any authorized SNAPPER dealer will replace, free of charge, any part or parts found upon

examination by the factory at McDonough, Georgia, to be defective in material or workmanship or both.

All transportation costs incurred by the purchaser in submitting material to an authorized SNAPPER dealer for

replacement under this warranty must be paid by the purchaser.

This warranty does not apply to engines and their components, and batteries, as these items are warranted separately.

This warranty does not apply to parts that have been damaged by accident, alteration, abuse, improper lubrication,

normal wear, or other cause beyond the control of SNAPPER. This warranty does not cover any machine or component

part that has been altered or modified changing safety, performance, or durability.

Batteries have a one (1) year prorated warranty period with free replacement if required during the first ninety (90) days

from the original purchase date. SNAPPER will not be responsible for any installation cost incurred. The battery warranty

only covers original equipment batteries and does not cover damage to the battery or machine caused by neglect or

abuse, destruction by fire, explosion, freezing, overcharging, improper maintenance, or use of improper electrolyte.

There is no other express warranty.

DISCLAIMER OF WARRANTY

Implied warranties, including those of merchantability and fitness for a particular purpose, are limited to three

(3) years from purchase date for the original purchaser's residential or other non-commercial use, and two (2)

years from purchase for the original purchaser's commercial, rental or other non-residential use, and to the

extent permitted by law, any and all implied warranties are excluded. This is the exclusive remedy. Liabilities for

consequential damages, under any and all warranties are excluded.

Some states do not allow limitations on how long an implied warranty lasts, or do not allow the exclusion or

limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

WARNING: THE USE OF REPLACEMENT PARTS OTHER THAN GENUINE SNAPPER PARTS MAY IMPAIR THE

SAFETY OF SNAPPER PRODUCTS AND WILL VOID ANY LIABILITY AND WARRANTY BY SNAPPER

ASSOCIATED WITH THE USE OF SUCH PARTS.

IMPORTANT: Please fill out the attached SNAPPER Product Registration Card immediately and mail to:

Snapper’s Product Registration Center, P.O. Box 1379, McDonough, Georgia 30253

PRIMARY MAINTENANCE

SERVICE NOTES

___________________________________________________________________

SERVICE NOTES

___________________________________________________________________

Safety Instructions & Operator’s Manual for

21” STEEL DECK

WALK MOWERS

COMMERCIAL MODEL

SERIES 12

IMPORTANT

Snapper products are built using engines that meet or exceed all applicable emissions requirements on

the date manufactured. The labels on those engines contain very important emissions information and

critical safety warnings. Read, Understand, and Follow all warnings and instructions in this manual, the

engine manual, and on the machine, engine and attachments. If you have any questions about your

Snapper product, contact your local authorized Snapper dealer or contact Snapper Customer Service at

Snapper, McDonough, GA. 30253. Phone: (1-800-935-2967).

The engine exhaust from this product contains chemicals known to the State

WARNING:

of California to cause cancer, birth defects or other reproductive harm.

SNAPPER INC.

MANUAL No. 3-5725 (REV. 2, 9/2/99)

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