40 ferrismowers.com
Problem: Engine will not turnover or start.
Engine flooded. Carbureted Models: Move choke
control to the closed position. Fuel
Injected Models: See authorized
service dealer.
Fuse blown. Replace fuse.
Battery terminals require cleaning. Clean the battery terminals.
Battery discharged or dead. Recharge or replace.
Wiring loose or broken. Visually check wiring & replace
broken or frayed wires. Tighten loose
connections.
Safety interlock switch faulty. Replace as needed. See authorized
service dealer.
Spark plug(s) faulty, fouled or
incorrectly gapped.
Clean and gap or replace. See
engine manual.
Water in fuel. Drain fuel and replace with fresh fuel.
Gas is old or stale. Drain fuel and replace with fresh fuel.
Fuel Injected Models Only:
Malfunction in fuel injection system.
See authorized service dealer.
Problem: Engine starts hard or runs poorly.
Cause Remedy
Fuel mixture is too rich. 1.) Clean air filter. 2.) Carbureted
Models: Check choke adjustment.
Fuel Injected Models: See
authorized service dealer.
Spark plug faulty, fouled, or
incorrectly gapped.
Clean and gap or replace. See
engine manual.
Problem: Engine knocks.
Cause Remedy
Low oil level. Check / Add oil as required.
Using wrong grade oil. See engine 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 manual.
Too much oil in crankcase. Drain excess oil.
Problem: Engine exhaust is black.
Cause Remedy
Dirty air filter. Replace air filter. See engine
manual.
Carbureted Models: Engine choke
control is in closed position.
Open choke control.
Problem: Malfunction Indicator Lamp (M.I.L.)
is flashing (Fuel Injected Models Only).
Cause Remedy
Problem with the fuel injection
system.
See authorized service dealer.
Problem: Engine runs but mower will not drive.
Cause Remedy
Transmission release lever(s) in
"disengaged" position.
Move transmission release lever(s)
to the "engaged" position.
Transmission drive belt is broken. See "Transmission Drive Belt
Replacement".
Problem: Engine runs but mower will not drive.
Transmission drive belt is slipping. See problem and cause below.
Brake is not fully released. See authorized service dealer.
Problem: Transmission drive belt slips.
Cause Remedy
Pulleys or belt is greasy or oily. Clean as required.
Tension is too loose. Adjust spring tension. See
"Transmission Drive Belt
Replacement".
Belt stretched or worn. Replace belt.
Problem: Parking brake will not hold.
Cause Remedy
Brake is incorrectly adjusted. See "Parking Brake Adjustment".
Problem: Mower steers or handles poorly.
Cause Remedy
Ground speed control lever linkages
are loose.
Check and tighten any loose
connections.
Improper tire inflation. See "Specifications" for proper tire
inflation and adjust tire pressures
accordingly.
Tracking needs adjustment. See "Tracking Adjustment".
Troubleshooting the Mower Deck
Problem: Mower deck will not raise.
Cause Remedy
Lift Linkage not properly attached or
damaged.
See authorized service dealer for
repair.
Problem: Engine stalls easily with mower deck engaged.
Cause Remedy
Engine speed too slow. Set to full throttle.
Ground speed to fast. Decrease ground speed.
Cutting height set too low. Cut tall grass at maximum cutting
height during first pass, and then
at the desired cutting height for the
second pass.
Discharge chute jamming with cut
grass.
Cut grass with discharge pointing
towards previously cut area.
Problem: Excessive mower deck vibration.
Cause Remedy
Blade mounting bolts are loose. Tighten to 120 ft. lbs. (163 N.m.).
Mower blades, arbors, or pulleys are
bent.
Check and replace as necessary.
Mower blades are out of balance. Remove, sharpen, and balance
blades. See "Servicing the Mower
Blades".
Belt installed incorrectly. Reinstall the belt correctly.
See "Mower Deck Drive Belt
Replacement".
Problem: Excessive belt wear or breakage.
Cause Remedy
Bent or rough pulleys. Repair or replace.
Using incorrect belt. Replace with correct belt.
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