Safety Instructions & Operator’s Manual for
21” STEEL DECK
WALK MOWERS
“M” MODEL
SERIES 17
MODELS
PUSH
MODEL
PROPELLED
MODEL
MR216017B
MR216017BV
WMR216017B
WMR216017BV
MR216517B
MRP216017B
MRP216017BV
WMRP216017B
MRP216517B
MODEL NUMBER EXPLANATION
M
R
P
21
60
17
BV
MODEL DESIGNATION
SELF-PROPELLED
CUTTING WIDTH
ENGINE TYPE
SERIES DESIGNATION
ENGINE HORSE POWER
M – Model Designation
W – Model Designation
P – Self Propelled Model
R – Recycling Model
17 - Series Designation
B – Briggs & Stratton Engine
V – Overhead Valve Engine
21 – 21” Cutting Width
60 – 6.0 HP 65 – 6.5 HP (Engine Horse Power)
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, & 4. 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.
COPYRIGHT © 2003
SNAPPER PRODUCTS INC.
ALL RIGHTS RESERVED
MANUAL No. 7-4349 (Rev. 1, 2/3/03)
IMPORTANT SAFETY INSTRUCTIONS
SAFE HANDLING OF GASOLINE
OPERATION
(Continued From Previous Page)
(Continued From Previous Column)
9. DO NOT leave the machine with the engine
running. STOP BLADE and STOP ENGINE
before leaving the operators position for any
reason.
3. DO NOT remove fuel cap or add fuel with the
engine running. Allow the engine to cool before
refueling.
4. DO NOT refuel the machine indoors.
5. DO NOT store the machine or fuel container
inside where there is an open flame, spark or
pilot light such as on a water heater or other
appliances.
6. DO NOT fill fuel containers inside a vehicle or
on a truck or trailer bed with a plastic liner.
Always place the containers on the ground
away from the vehicle before filling.
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.
11. STOP engine and wait until the blade comes to
complete STOP before removing grass bag
and/or clearing grass.
7. Remove gas-powered equipment from the
vehicle or trailer and refuel it on the ground. If
this is not possible, then refuel equipment using
a portable container, rather than a gasoline
dispenser nozzle.
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.
8. DO NOT start gas powered equipment in
enclosed vehicles or trailers.
14. Watch out for traffic when near or crossing
roadways.
9. Keep the nozzle in contact with the rim of the
fuel tank or container opening at all times until
fueling is complete. DO NOT use a nozzle lock-
open device
15. DO NOT operate engine in enclosed areas.
Engine
exhaust
gases
contain
carbon
monoxide, a deadly poison.
10. If fuel is spilled on clothing, change clothing
immediately.
11. Never overfill a fuel tank. Replace fuel cap and
tighten securely.
MAINTENANCE AND STORAGE
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
OPERATION
1. DO NOT put hands or feet near or under rotating
parts. Keep clear of discharge area while engine
is running.
children in
building.
a
well ventilated, unoccupied
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.
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.
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.
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.
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. 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.
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.
3
IMPORTANT SAFETY INSTRUCTIONS
MAINTENANCE AND STORAGE
(Continued From Previous Page)
9. Mower blades are sharp and can cut. Wrap the
blades or wear heavy leather gloves and use
CAUTION when handling them.
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.
4
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS..............................................2 - 4
TABLE OF CONTENTS ............................................................................ 5
SECTION 1 - FAMILIARIZATION.............................................................. 6
SECTION 2 - OPERATING INSTRUCTIONS.......................................7-11
Pre-start Checklist...................................................................................................... 7
Starting & Stopping Engine & Blades ................................................................... 7-8
Starting & Stopping Wheel Drive.............................................................................. 8
Handle Height Adjustment......................................................................................... 8
Cutting Height Adjustment........................................................................................ 8
Recycling Operation................................................................................................... 9
Installation of Grass Bag Adapter............................................................................. 9
Installation of Recycling Plug ................................................................................... 9
Installation of Grass Bag (Door Type)................................................................. 9-10
Installation of Grass Bag (Slide Closure Type) ..................................................... 10
Installation of Discharge Deflector......................................................................... 11
Installation of Recycling Cover............................................................................... 11
SECTION 3 - MAINTENANCE INSTRUCTIONS................................12-13
Change Engine Oil.................................................................................................... 12
Check Transmission Grease.............................................................................. 12-13
Check Mower Blade ................................................................................................. 13
Check Engine Drive Belt.......................................................................................... 13
Check Transmission Poly-V Belt ............................................................................ 13
Service - Annually..................................................................................................... 13
Engine................................................................................................................... 13
Air Filter................................................................................................................ 13
Engine Oil............................................................................................................. 13
Storage Procedure ................................................................................................... 13
SECTION 4 - ADJUSTMENTS AND REPAIR....................................14-20
Mower Blade Replacement...................................................................................... 14
Blade Sharpening................................................................................................ 14-15
Wheel Drive Control Adjustment ............................................................................ 15
Driven and Drive Disc Service ................................................................................ 16
Cleaning Drive Disc and Driven Disc................................................................. 16
Drive Spring Repair/Replacement...................................................................... 16
Driven Disc Adjustment................................................................................. 16-17
Driven Disc Replacement .............................................................................. 17-18
Driven Disc Bearing Replacement..................................................................... 18
Hex Shaft Bearing Replacement ........................................................................ 18
Belt Service.......................................................................................................... 19-20
Engine Drive Belt Replacement .................................................................... 19-20
Transmission Poly-V Belt Replacement............................................................ 20
TROUBLESHOOTING ............................................................................ 21
SERVICE SCHEDULE ............................................................................ 22
Maintenance/Replacement Parts ............................................................................ 22
WARRANTY AND PRODUCT REGISTRATION..............................23 - 24
PRIMARY MAINTENANCE ................................................................25-28
! IMPORTANT !
The pictures and illustrations in this manual are provided for reference only and may differ
from your specific model. Contact your local SNAPPER dealer if you have questions.
5
Section 1 - FAMILIARIZATION
GROUND
SPEED
FAST
CONTROL
SLOW
UPPER
HANDLE
WHEEL DRIVE
CONTROL
ROPE
START
HANDLE
BLADE
CONTROL
KNOB
MID-HANDLE
BRIGGS & STRATTON ENGINE
PRIMER BULB –
LOCATED AT FRONT OF ENGINE
TECUMSEH ENGINE
PRIMER BULB –
LOCATED ON RIGHT SIDE
OF ENGINE
KNOB
REAR HEIGHT
ADJUSTMENT
LEVER
LOWER
HANDLE
OIL FILL CAP
& DIPSTICK
FUEL
FILLER
CAP
MUFFLER
REAR WHEEL
MOWER DECK
ENGINE AIR
FILTER COVER
RECYCLING
DECK
FRONT WHEEL
COVER
FRONT HEIGHT
ADJUSTMENT LEVERS
PRIMER BULB
(SEE INSET)
FIGURE 1.1
1.2 NOMENCLATURE
1.1 INTRODUCTION
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, & 4 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.
6
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.
The engine speed is preset and is not adjustable. A
primer is provided to assist in starting a cold engine.
1. Push primer bulb three times to start a cold
engine. NOTE: The primer should not be required
to restart a hot engine. See Figure 2.3.
NOTE: Stop the engine (and blade) by releasing the
blade control.
WHEEL
DRIVE
FOR ENGINES
EQUIPPED
WITH PRIMER
BULB
CONTROL
BLADE
CONTROL
FIGURE 2.1
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.
PUSH PRIMER BULB
THREE TIMES TO
START COLD
ENGINE
FIGURE 2.3
2. Pull blade control against handle. See Figure 2.1.
3. Pull rope start handle to crank engine.
4. After engine starts, 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.
7
Section 2 - OPERATING INSTRUCTIONS
2.2 STARTING & OPERATION
HIGHER
LOWER
HANDLE
WARNING
Stop engine and mower blade by releasing the blade
control before adjusting ground speed.
2.2.2. PROPELLING MOWER
(Self Propelled Model Only)
1. Stop engine and mower blade by releasing
the blade control before adjusting ground
speed. Move ground speed control to the desired
speed position. See Figure 2.4.
2. Start engine. Refer to Section “Starting &
Operation”.
LOWER
LOOSEN LOWER
NUTS ON EACH
LOWER HANDLE
3. Move wheel drive control against handle to
engage wheel drive and propel mower forward. See
Figure 2.1.
FIGURE 2.5
2.5 CUTTING HEIGHT ADJUSTMENT
1. Pull the height adjusting latch outward and move
to desired cutting height. See Figure 2.6.
GROUND SPEED
CONTROL
IMPORTANT: Move rear height adjustment latch for rear
wheel adjustment to correspond with raising or lowering
the front wheels to maintain the level of the deck.
FAST SPEED
REMOVE HAIR PIN
AND CLEVIS PIN
SWIVEL
WHEEL
MODEL
SHOWN IN
LOWEST CUTTING
SLOW SPEED
HIGHEST CUTTING
HEIGHT
LATCH
1 LOWEST
CUTTING
HEIGHT
FIXED
WHEEL
MODEL
FIGURE 2.4
2
3
2.3 STOPPING
4
5
Stop engine and blade by releasing the blade
control. Stop forward motion of mower by releasing
the wheel drive control.
6 HIGHEST
CUTTING
HEIGHT
6
2.4 HANDLE HEIGHT ADJUSTMENT
The height of the mower handle can be adjusted as
follows:
FIGURE 2.6
2. Set all wheels at the same cutting height. The
highest cutting position is Notch 6. The lowest
cutting position is Notch 1.
1. Loosen the lower nuts on each lower handle as
shown in Figure 2.5.
2. Move upper mower handle up or down until the
desired position is achieved.
3. Tighten the lower nuts on each lower handle to
maintain desired position.
8
Section 2 - OPERATING INSTRUCTIONS
INSTALLATION of RECYCLING PLUG
(Optional Accessory on Some Models)
STEP 1: Once adapter has been installed, recycling may
be desired. Insert recycling plug completely and securely
into adapter. Install grass bag. See Figure 2.8.
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.
INSERT RECYCLING PLUG
COMPLETELY AND SECURELY
INTO ADAPTER. INSTALL
GRASS BAG.
PLUG
2.6 RECYCLING OPERATION
NOTE: For best recycling results, cut up to a maximum of 1/3
of grass blade length and recycle ONLY when grass is dry.
1. Set all wheels in the highest cutting position (Notch 6).
2. Move engine speed control to “FAST” (Rabbit)
position.
ADAPTER
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.
INSTALLATION of GRASS BAG ADAPTER
(Optional Accessory on Some Models)
STEP 1: Install the grass bag adapter and secure to the
side and top of the deck with the two nuts provided with the
machine. Slot in front edge of adapter must be under nut
located on top of deck. See Figure 2.7.
FIGURE 2.8
2.7 INSTALLATION of GRASS BAG
(Door Type, Optional Accessory)
Install grass bag by sliding connector over flange of bag
adapter. See Figure 2.9.
SECURE ADAPTER
TO DECK WITH NUTS
POSITION BAG
BETWEEN HANDLES
SECURE
WITH NUTS
SLIDE
CONNECTOR
DOWN OVER BAG
ADAPTER FLANGE
CONNECTOR
ADAPTER
FIGURE 2.7
BAG
ADAPTER
FIGURE 2.9
9
Section 2 - OPERATING INSTRUCTIONS
B. Position grass bag between handles. See Figure
WARNING
2.12. Install grass bag by sliding connector over flange
of adapter. Attach grass bag hooks over middle handle
cross bar. See Figure 2.13.
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.
LOWER HANDLES
HANDLE
BAG CONNECTOR
2.8 INSTALLATION of GRASS BAG
(Continued From Previous Page)
(Door Type, Optional Accessory)
Attach grass bag hooks over middle handle cross bar.
See Figure 2.10.
ADAPTER
FLANGE
MIDDLE
HANDLE
CROSS
BAR
ATTACH BAG HOOKS
OVER MIDDLE HANDLE
CROSS BAR
FIGURE 2.12
HOOK BAG HANDLE
OVER LOWER
HANDLES
FIGURE 2.10
2.9 INSTALLATION of GRASS BAG
(Slide Closure Type, Optional Accessory on
Some Models)
Install grass bag as shown. Adapter must be
installed first, before grass bag can be installed.
A. Install the top wire to the grass bag. Tie the bag
slider to the top wire. Fold bag opening into a "Z"
and pull bag into slider. See Figure 2.11.
BAG
SLIDER
SLIDE CONNECTOR
OVER END OF
“Z” FOLD BAG
AS SHOWN
ADAPTER FLANGE
FIGURE 2.13
WARNING
DO NOT operate without entire Grass Bag or guard in
place. Grass Bag components are subject to
deterioration during normal use. Inspect frequently
and replace worn or damaged components
immediately.
FIGURE 2.11
10
Section 2 - OPERATING INSTRUCTIONS
WARNING
SLIDE
DEFLECTOR
SLOT
INSTALL
DISCHARGE
DEFLECTOR
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.
2.10 INSTALLATION of DISCHARGE DEFLECTOR
(Optional Accessory On Some Models)
Install discharge deflector if discharging is desired. Grass
bag and bag adapter must be removed.
A. Remove grass bag from handle and bag adapter.
See Figure 2.14.
INSTALL
NUTS
B. Remove front and rear nuts attaching bag adapter
to deck. See Figure 2.14.
FIGURE 2.15
2.10 INSTALLATION of RECYCLING COVER
(Optional Accessory on Some Models)
It will be necessary to remove bag adapter and grass bag
or discharge deflector before installing recycling cover.
See previous section for instructions. Install the recycling
cover and secure to the side and top of the deck with the
two nuts provided on the machine. Slide top portion of
cover under nut secured to the deck. See Figure 2.16.
REMOVE GRASS BAG
FROM HANDLE AND
BAG ADAPTER
RECYCLING
COVER
REMOVE NUTS
FIGURE 2.14
C. Install discharge deflector and secure to deck
using hardware just removed in Step A. Slot in front
edge of discharge deflector must be under nut as
shown and both bolts protruding through holes in the
side of the deflector. Secure nuts to the side of
deflector. Tighten nuts securely. See Figure 2.15.
INSTALL RECYCLING
COVER TO THE DECK
USING THE TWO NUTS
FIGURE 2.16
WARNING
DO NOT operate without entire Grass Bag or guard in
place. Grass Bag components are subject to
deterioration during normal use. Inspect frequently
and replace worn or damaged components
immediately.
11
Section 3 - MAINTENANCE
3.1 INTRODUCTION
3.2.2. CHECK GREASE LEVEL IN TRANSMISSION
1. Remove transmission fill plug. See Figure 3.2.
2. 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.
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.
3.2 SERVICE - AFTER FIRST 5 HOURS
3.2.1. CHANGE ENGINE OIL
FILL
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.
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.
FIGURE 3.2
NOTE: Snapper “00” Grease (Part No. 2-9443) is available
at your SNAPPER dealer.
(Continued on Next Page)
FIGURE 3.1
IMPORTANT: Drain fuel tank before tipping mower.
12
Section 3 - MAINTENANCE
3.2.2. CHECK GREASE LEVEL IN TRANSMISSION
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: Do not spill grease or oil on surface of drive disc.
See Figure 3.3.
3. Reinstall transmission plug.
4. Check grease level after each 25 hours of
operation.
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.
KEEP DRIVE DISC CLEAN !
RECOMMENDED
BLADE RETAINING
CAP SCREW TORQUE
VALUE SHOULD BE
40 FT. LBS.
FIGURE 3.4
3.3 SERVICE - ANNUALLY
Perform all maintenance as described in the “Service
Schedule” section of this manual.
FIGURE 3.3
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.
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.
3.4 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.
IMPORTANT: Drain fuel tank before tipping mower.
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.
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. Loosen handle knobs. Carefully fold the handles
forward, “flexing” the control cables to prevent cable
damage.
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 40 ft. lbs.
Figure 3.4.
See
7. Store the mower in a shed or other dry area,
protected from weather.
4. Check blade for sharpness, wear and damage.
Refer to Section “Blade Wear Limits”.
13
Section 4 - ADJUSTMENTS & REPAIR
2. Replace the blade if it is badly chipped, bent,
WARNING
noticeably out of balance or has cracks or notch in
either tip. See Figure 4.1 & 4.2. Replace with new
blade.
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.
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 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.
4.1.3. BLADE SHARPENING
1. Disconnect spark plug wire and secure end away
from plug.
IMPORTANT: Drain fuel tank before tipping mower.
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.
NEW
WEAR LIMIT
BLADE
(NOTCH STARTS)
DANGEROUS
CONDITION!
2. Tilt mower up on its rear wheels.
3. Remove blade. See Figure 4.3.
DO NOT USE ON
MOWER! REPLACE
WITH NEW BLADE.
MAKE SURE THAT
BLADE HUB IS
SEATED BETWEEN
FLANGES
HUB
BLADE
FIGURE 4.1
FLANGE
4.1.2.
NINJA BLADE WEAR LIMIT
1. Inspect blade frequently for signs of excessive wear
or damage. See Figure 4.2.
BLADE
WEAR LIMIT. CRACKS
NEW BLADE
OR NOTCHES BEGIN
TO APPEAR ON TIP.
CONE WASHER
(Concave Side Up)
CAPSCREW
FIGURE 4.3
DANGEROUS!
DO NOT USE A BLADE IN
THIS CONDITION!
(Continued on Next Page)
FIGURE 4.2
14
Section 4 - ADJUSTMENTS & REPAIR
WARNING
CLUTCH CABLE
VINYL SPRING COVER
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.
CLUTCH
CABLE EYE
1/16” TO 1/8”
CLEARANCE
UPPER
SPRING
LOWER
SPRING
SPRING HOOK
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 4.4.
DO NOT SHARPEN
BEYOND ORIGINAL
CUTTING EDGE
CABLE
CLUTCH CABLE EYE
22 TO 28º
SPRING
BLADE TIP
END VIEW OF
BLADE ASSEMBLY
FIGURE 4.5
ORIGINAL CUTTING EDGE
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.
FIGURE 4.4
5. Check blade for balance. If necessary, correct
balance by grinding heavy end of blade.
6. Reinstall blade. See Figure 4.3. Check torque of
blade retaining cap screw. Recommended torque
should be 40 ft. lbs.
NOTE: The vinyl spring cover should be kept over the
spring at all times except for adjustments.
4. If the wheel drive control fails to return quickly to
the “OFF” position when released, check for binding
at the cable holdings located on the side of the right
handle. The upper clip should be located 2” below
the upper knob; the lower clip should be 4” above
the lower knob. The cable should slide freely with
the clips installed at these locations.
NOTE: The following sections 4.2 through
4.4 are for self-propelled models only.
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 4.5.
15
Section 4 - ADJUSTMENTS & REPAIR
WARNING
DO NOT attempt any maintenance, adjustments or
USE NEEDLE
NOSE PLIERS
TO INSTALL
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.
DRIVE SPRING
4.3 DRIVEN AND DRIVE DISC SERVICE
If the mower does not propel itself properly, See
Figure 4.6. Check for the following problems:
DRIVE
SPRING
DRIVEN DISC
& RUBBER
POLY-V-BELT
RING
DRIVE
SPRING
ENGINE
DRIVE
BELT
DRIVE
DISC
FIGURE 4.7
4.3.3. Driven Disc Adjustment
If the drive disc and driven disc are clean and the
mower drive is not making correct drive disc and driven
disc contact, adjust the driven disc as follows:
FIGURE 4.6
1. Place ground speed control in the number six
speed position. See Figure 4.8.
1. Grease on drive disc causing slippage.
2. Broken or disconnected drive spring.
3. Driven disc is out of adjustment.
4. Driven disc rubber is worn - does not contact
drive disc properly.
MOVE GROUND SPEED
CONTROL TO SIX SPEED
POSITION
5. Worn Poly-V Belt or engine drive belt.
SIXTH SPEED
POSITION
NOTE: If any of the above (1 thru 5) are causing
problems, service as follows:
SIXTH
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:
FIRST SPEED
POSITION
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.
FIRST
4. Dry components with a clean cloth.
4.3.2. Drive Spring Repair/Replacement
If drive spring is loose, reconnect as shown in Figure
4.7. If spring is broken, replace with new spring.
IMPORTANT: If machine drive system continues
slipping see Trouble Shooting section.
FIGURE 4.8
(Continued on Next Page)
16
Section 4 - ADJUSTMENTS & REPAIR
WARNING
DO NOT attempt any maintenance, adjustments or
1/8” MEASUREMENT TO
OUTSIDE EDGE OF
DRIVE DISC
SLIDE DRIVEN
DISC ASSEMBLY
TOWARD
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.
OUTSIDE EDGE
DRIVE
DISC
4.3.3. DRIVEN DISC ADJUSTMENT
(Continued From Previous Page)
2. Remove driven disc spring from driven disc
assembly. Loosen connector hex nut. See Figure
4.9.
TRANSFER
ROD
DRIVEN DISC ASSEMBLY
CONNECTOR HEX NUT
CONNECTOR
DRIVE
DISC
OUTSIDE
EDGE
DRIVEN
DISC
SPRING
FIGURE 4.10
TRANSFER
ROD
4.3.4. Replacing Rubber Driven Disc
If the rubber is badly chunked or worn it must be
replaced. Install new Driven Disc 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
4.11.
CONNECTOR
CONNECTOR
HEX NUT
FIGURE 4.9
3. Slide driven disc assembly over to 1/8” from
outside edge of drive disc. Maintaining the 1/8”
measurement, remove any looseness from the
linkage. This can be done by holding the transfer
rod and applying pressure to the left (as viewed
from operators position). Then retighten the
connector hex nut securely. See Figure 4.10. 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
FIGURE 4.11
17
Section 4 - ADJUSTMENTS & REPAIR
4.3.5. Replacing Bearing In Driven Disc Assembly
WARNING
IMPORTANT: The bearing, on these “M” series
machines, is staked into the thrust plate. The bearing will
have to be driven out with a mallet and a large punch. A
new bearing with four retaining screws will have to be
purchased to replace existing bearing.
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.
If the driven disc bearing requires replacement,
remove the driven disc assembly and replace
bearing 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
4.11.
2. Using needle nose pliers, unhook the drive
spring and slide the driven disc assembly off the
hex shaft. See Figure 4.12.
3. Remove both snap rings that secure rubber
driven disc hub to thrust plate. See Figure 4.13.
4. Slide the rubber driven disc hub out of the
bearing.
4.3.4. Replacing Rubber Driven Disc
(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 4.12.
3. Remove the two snap rings which secure the
rubber driven disc to the driven disc assembly. See
Figure 4.13.
4. Install new rubber driven disc onto driven disc
assembly with retaining rings.
5. Reverse above procedures for reassembly and
installation of driven disc assembly.
5. Drive out existing bearing.
6. Install new bearing and secure to thrust plate
with four retaining screws. Tighten screws securely.
7. Reassemble components in reverse order.
DRIVEN DISC
ASSEMBLY
INSTALL NEW
DRIVEN DISC
SNAP
RINGS
FIGURE 4.12
FIGURE 4.13
18
Section 4 - ADJUSTMENTS & REPAIR
4.4 BELT SERVICE
WARNING
On self-propelled 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.
2. Remove the 3/8” hex lock nut which is located at
the end of the hex shaft on the outside of the right
wheel bracket. See Figure 4.14.
4.4.1. Engine Drive Belt Replacement
(Stretch Type Belts)
1. Empty the fuel tank.
2. Note the belt routing in Figure 4.15. There is no
idler pulley on these models to disconnect. See Figure
4.15.
DRIVE BELT
ENGINE DRIVE
PULLEY
3. Remove holder, O-ring and bearing.
4. Install new bearing.
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
TOP VIEW OF STRETCH TYPE BELT ROUTING
BALL BEARING
FIGURE 4.15
“O” RING
3/8”
LOCK
NUT
BALL
BEARING
HOLDER
FIGURE 4.14
19
Section 4 - ADJUSTMENTS & REPAIR
9. Loop the belt around the pulley on the bottom of
the drive disc.
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. DO NOT use a cutting blade that shows signs of
excessive wear or damage.
10. Reinstall drive disc and retaining hardware.
IMPORTANT: 1) The square shoulder of the drive
disc bolt must fit into the square hole of the
bushing. 2) The square end of bushing must fit into
the bracket slot.
11. Reinstall belt cover and tighten bolts securely.
12. Reinstall blade hub and cutter blade.
Recommended torque for blade cap screw is 40 ft. lbs.
4.4.2. Transmission Poly-V Belt Replacement
1. Remove the driven disc. Refer to Section
“Replacing Driven Disc Rubber Ring” for procedure.
2. Note the routing of the old belt around the three
pulleys before removing it. See Figure 4.17.
3. Place new Poly-V Belt over end of hex shaft and
onto driven pulley.
4.4.1. Engine Drive Belt Replacement
(Stretch Type Belts)
(Continued From Previous Page)
IMPORTANT: Drain fuel tank before tipping mower.
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.
4. Work belt onto top of idler pulley.
5. 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 4.17.
3. Remove the driven disc. Refer to Section
“Replacing Rubber Driven Disc Ring” for driven disc
assembly removal procedure.
4. 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.
IDLER
PULLEY
DRIVE
PULLEY
DIFFERENTIAL
BRACKET
POLY-V
BELT
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.
HEX SHAFT
6. Remove the belt cover located under deck.
7. Lift the drive disc up and remove worn belt.
8. Loop one end of new belt over engine pulley and
insert the other end through slot in deck. See Figure
4.15.
BELT GUIDE
DRIVEN
PULLEY
DRIVE DISC
ROUTING OF POLY-V-BELT
FIGURE 4.17
SLOT IN END
OF DRIVE DISC
BOLT
BUSHING
DECK BRACKET
(PARTIALLY SHOWN)
BOLT RETAINER
INTERNAL TOOTH
LOCKWASHER
NUT
FIGURE 4.16
20
TROUBLESHOOTING
PROBLEM
PROBABLE CAUSE
CORRECTIVE ACTION
1. Fill fuel tank with fresh fuel.
1. Fuel tank empty.
Engine Will Not Start
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.
1. Blade control is released or is not being held securely 1. Blade control should be held securely against
Engine Stalls or Stops
After Running
against handle.
2. Fuel tank empty.
handle at all times during operation of mower.
3. Fill with fuel to proper level.
4. Clean free of all debris.
3. Engine air pre-cleaner and or air cleaner dirty.
4. Spark plug defective or gap set improperly.
5. Water, debris or stale fuel in fuel system.
5. Service spark plug.
6. Drain and clean fuel system.
1. Engine air pre-cleaner or air cleaner dirty
1. Clean or replace filters.
Engine Loses Power
Excessive Vibration
2. Spark plug faulty.
3. Water, debris or stale fuel in fuel system.
2. Service spark plug.
3. Drain and clean fuel system.
1. Damaged, out of balance or bent mower blade.
2. Loose blade components.
1. Service mower blade.
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
1. Damaged transmission
Mower Will Not Move
Loss Of Traction
1. Contact authorized SNAPPER dealer.
2. Replace engine drive belt.
3. Reinstall belt onto pulley. Check for damage.
4. Replace Poly-V belt.
2. Engine drive belt broken requires replacement
3. Engine drive belt has jumped off of the pulley
4. Poly V belt is broken.
(Self-Propelled Models)
5. Poly V belt has jumped off of the pulley
6. Driven disc slipping
5. Reinstall belt onto pulley. Check for damage.
6. Clean or replace driven disc.
7. Broken or loose differential link bolt
1. Cutting height too low or high.
2. Engine speed too slow.
7. Tighten or replace link bolt.
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.
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 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.
5. Build up of grass clippings and debris under deck.
6. Improper blade installed on deck.
7. Blade installed improperly on deck.
1. Leaking engine case.
4. Service mower blade.
5. Clean deck.
6. Install proper SNAPPER blade.
7. Install blade 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.
21
SERVICE SCHEDULE
ITEM
SERVICE PERFORMED
REF.
Page 7
EACH
USE
5
HRS
25
HRS
50
HRS
100
HRS
EACH
SEASON
Check Oil Level
Engine Oil
X
Initial Oil Change
Periodic Oil Change
Page 10
Page 11
X
X*
Clean Sponge Element
Clean or Replace
Replace
Engine Manual
& Page 11
Engine Manual
Air Pre-Cleaner
Air Cleaner
X**
X**
Engine Manual
Engine Manual
Spark Plug
X
Clean Shroud & Fins
Engine Cooling
System
X**
Check For Wear And
Tension
Check For Wear, Damage Page 12-13
& Replacement
Clean Debris
Accumulation
Page 17
Drive Belts
X
X
X
X
Mower Blade
Mower Deck
X
X
Page 11
Check Grease Level
Pages 10
Transmission
Grease
X
X
Periodic Grease Check
Pages 11
Check for Wear Damage Page 13-16
& Replacement
Drive Disc
X
* 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
Blade Control Cable
7-2933
7-2932
4-1939
2-6407
1-2354
4-6784
4-1855
06135
Clutch Pull Cable (Propelled Models)
Cutter Blade (Mulching)
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 Walk Behind Mower
“M” Series 17
22
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 ninety (90) days 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 ninety
(90) days 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
23
SNAPPER PRODUCT REGISTRATION FORM
IMPORTANT: KEEP THIS INFORMATION FOR YOUR PERSONAL RECORDS
(Complete the following information on your Snapper purchase)
Model Number ________________________________________________________
Serial Number _________________________________________________________
Date of Purchase _______________________________________________________
Retailer _______________________________________________________________
Retailer’s Phone Number________________________________________________
It is very important that you register your purchase with Snapper to ensure
warranty coverage. Please mail your product registration card to:
Snapper at P.O. Box 1379, McDonough, Georgia 30253.
You can contact us at our web site or if you would like to speak with a Customer
Service Representative. Call us at the Snapper Customer Relations Center. For
faster service please have your Serial Number and Model Number available.
Call the Snapper Customer Relations Center at 1-800-935-2967.
Eastern Standard Time
Monday through Friday from 8am to 6pm.
Saturday from 9am to 1pm.
24
PRIMARY MAINTENANCE
25
PRIMARY MAINTENANCE
26
PRIMARY MAINTENANCE
27
PRIMARY MAINTENANCE
28
NOTES
29
NOTES
30
NOTES
31
Safety Instructions & Operator’s Manual for
21” STEEL DECK
WALK BEHIND MOWERS
“M” MODEL
SERIES 17
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).
WARNING
BATTERY POSTS, TERMINALS AND RELATED ACCESSORIES CONTAIN LEAD AND LEAD COMPOUNDS,
CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER AND BIRTH DEFECTS OR OTHER
REPRODUCTIVE HARM. WASH HANDS AFTER HANDLING.
WARNING
ENGINE EXHAUST, SOME OF ITS CONSTITUENTS, AND CERTAIN VEHICLE COMPONENTS CONTAIN OR
EMIT CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER OR OTHER
REPRODUCTIVE HARM.
COPYRIGHT © 2003
SNAPPER PRODUCTS INC.
ALL RIGHTS RESERVED
MANUAL No. 7-4349 (Rev.1, 2/3/03)
32
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