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SECTION 11: TROUBLE SHOOTING GUIDE
Corrective ActionsTrouble
Engine fails to
start
Engine runs
erratic
Possible Cause(s)
Blade control handle disengaged,
Spark plug wire disconnected.
Dirty aircleaner.
Primer button not depressed.
Throttle control lever not in correct
starting position (if so equipped).
Fuel tank empty or stale fuel.
Blocked fuel line (if so equipped),
Faulty spark plug,
Engine flooded.
Unit running in START position.
Spark plug wire loose.
Engine
overheats
Carburetor not adjusted properly.
Occasional skip Spark plug gap too close.
(hesitates) at Carburetor idle mixture adjustment
high speed improperly set,
Blocked fuel line (if so equipped) or
stale fuel.
Vent in gas cap plugged,
Water or dirt in fuel system.
Dirty air cleaner.
Carburetor out of adjustment.
Engine oil level low,
Dirty air cleaner.
Air flow restricted.
Engage blade control handle.
Connect wire to spark plug.
Refer to the engine manual packed with your unit.
Refer to the engine manual packed with your unit.
Move throttle lever to FAST or START position.
Fill tank with clean fresh gasoline. Fuel will not last over thirty
days unless a fuel stabilizer is used.
Clean fuel line.
Clean, adjust gap or replace.
Refer to the engine manual packed with your unit,
Move throttle lever to FAST position,
Connect and tighten spark plug wire. Check spark plug for
fouling.
Clean fuel line; fill tank with clean, fresh gasoline. Fuel will
not last over thirty days unless a fuel stabilizer is added,
Clear vent or threads or replace.
Drain fuel tank. Refill with fresh fuel.
Refer to the engine manual packed with your unit.
Refer to the engine manual packed with your unit.
Fill crankcase with proper oil.
Refer to the engine manual packed with your unit.
Stop engine and disconnect spark plug wire. Remove blower
housing and clean,
Refer to the engine manual packed with your unit or see an
authorized service dealer,*
Adjust gap to ,030".
Refer to the engine manual packed with your unit.
Idles poorly Spark plug fouled, faulty or gap too Reset gap to .030" or replace spark plug.
wide.
Carburetor improperly adjusted. Refer to the engine manual packed with your unit.
Dirty air cleaner. Refer to the engine manual packed with your unit.
Excessive Cutting blade loose or unbalanced. Tighten blade and adapter. Balance blade.
vibration Bent cutting blade. See an authorized service dealer.
Mower will not Engine speed too low. Set throttle between 3/4 and full throttle.
mulch grass Wet grass. Do not mow when grass is wet; wait until later to cut.
Excessively high grass. Mow once at a high cutting height, then mow again at
desired height or make a narrower cutting swath (1/2 width).
Uneven cut Wheels not positioned correctly. Place all four wheels in same height position.
Dull blade. Sharpen or replace blade.
Wheels will not Belt not installed properly. Check belt for proper pulley installation and movement.
propel** Debris clogging drive operation. Clean out debris.
**Self-propelled models only
Note: For repairs beyond the minor adjustments above, contact your local authorized service dealer.
19
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