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Problem: Engine starts hard or runs poorly.
Cause Remedy
Fuel mixture too rich. Clean air filter. Check choke
adjustment.
Spark plug(s) faulty, fouled, or
incorrectly gapped.
Clean and gap, or replace. See
engine operator's manual.
Problem: Engine knocks.
Cause Remedy
Low oil level. Check and add oil as required.
Using wrong grade oil. See engine operator's manual.
Problem: Excessive oil consumption.
Cause Remedy
Engine running too hot. Clean engine fins, blower screen,
and air cleaner.
Using wrong weight oil. See engine operator's manual.
Too much oil in crankcase. Drain excess oil.
Engine exhaust is black.
Cause Remedy
Dirty air filter. Replace air filter. See engine
operator's manual.
Engine choke is in closed position. Open choke control.
Problem: Engine runs, but rider will not drive.
Cause Remedy
Transmission release lever(s) in
"free-wheel" position
Move transmission release lever(s)
to the "drive" position.
Belt is broken. Replace belt. See Transmission
Drive Belt Replacement.
Drive belt slips. See problem and cause below.
Brake is not fully released. See authorized dealer.
Problem: Rider drive belt slips.
Cause Remedy
Pulleys or belt is greasy or oily. Clean as required.
Tension too loose. Adjust the spring tension.
See Transmission Drive Belt
Replacement.
Belt stretched or worn. Replace belt.
Problem: Brake will not hold.
Cause Remedy
Brake is incorrectly adjusted. See Parking Brake Adjustment.
Braking components in transmission
worn.
See authorized dealer.
Problem: Rider steers or handles poorly.
Cause Remedy
Steering lever linkages are loose. Check and tighten any loose
connections.
Improper tire inflation. See Checking Tire Pressures
Troubleshooting the Mower Deck
Problem: Mower will not raise.
Cause Remedy
Problem: Mower will not raise.
Lift linkage not properly attached or
damaged.
See authorized dealer.
Problem: Engine stalls easily with mower engaged.
Cause Remedy
Engine speed too slow. Set to full throttle.
Ground speed too fast. Decrease ground speed.
Cutting height set too low. Cut tall grass at maximum cutting
height during first pass.
Discharge chute jamming with cut
grass.
Cut grass with discharge pointing
towards previously cut area.
Problem: Excessive mower vibration.
Cause Remedy
Blade mounting bolts are loose. Tighten to 120 ft-lbs (163 Nm).
Mower blades, arbors, or pulleys are
bent.
Check and replace as necessary.
Mower blades are not balanced. Remove, sharpen, and balance
blades. See Servicing the Mower
Blades.
Belt installed incorrectly. Reinstall the belt correctly.
Problem: Excessive belt wear or breakage.
Cause Remedy
Bent or rough pulleys. Repair or replace.
Using incorrect belt. Replace with correct belt.
Problem: Mower drive belt slips, or fails to drive.
Cause Remedy
Idler pulley spring broken, or not
properly attached.
Repair or replace as needed.
Mower drive belt broken. Replace mower drive belt.
Problem: Mower does not engage.
Cause Remedy
Electrical wiring damage. Locate and repair damaged wire.
Battery voltage too low. Recharge battery and check
alternator. See Battery Maintenance.
Troubleshooting Common Cutting
Problems
Problem: Streaking
Streaking is when thin strips of uncut grass are left behind the mower.
Streaking is usually caused by operator error or poor blade maintenance.
Cause Remedy
Blades are not sharp. Sharpen your blades.
Blades are worn down too far. Replace your blades.
Engine speed is too slow. Always mow at full throttle.
Ground speed is too fast. Slow down.
Deck is plugged with grass. Clean out the mower.
Not overlapping cutting rows enough. Overlap your cutting rows
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