Section 13: Trouble Shooting Guide - Yard-Man 247.37979 Operator's Manual

SECTION 13: TROUBLE SHOOTING GUIDE

Trouble
Engine fails to start
Engine runs erratic
Engine overheats
Occasional skip (hesitates) at
high speed
Idles poorly
Excessive vibration
Mower will not mulch grass
Uneven cut
Refer to separate engine manual packed with your mower for more engine related information.
NOTE:
For repairs beyond the minor adjustments listed above, contact your nearest authorized service dealer or
call 1-800-800-7310 for the Customer Support Center.
Possible Cause(s)
Blade control handle disengaged.
Spark plug wire disconnected.
Throttle control lever not in correct
starting position.
Fuel tank empty, or stale fuel.
Blocked fuel line.
Faulty spark plug.
Engine flooded.
Unit running in START position.
Spark plug wire loose.
Blocked fuel line 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.
Air flow restricted.
Carburetor not adjusted properly.
Spark plug gap too close.
Spark plug fouled, faulty or gap too
wide.
Carburetor improperly adjusted.
Dirty air cleaner.
Cutting blade loose or unbalanced.
Bent cutting blade.
Engine speed too low.
Wet grass.
Excessively high grass.
Dull blade.
Wheels not positioned correctly.
Dull blade.
23
Corrective Action
Engage blade control handle.
Connect wire to spark plug.
Move throttle lever to FAST or START
position.
Fill tank with clean, fresh gasoline.
Clean fuel line.
Clean, adjust gap or replace.
Crank engine with throttle in FAST position.
Move throttle lever to FAST position.
Connect and tighten spark plug wire.
Clean fuel line; fill tank with clean, fresh
gasoline.
Clear vent.
Drain fuel tank. Refill with fresh fuel.
Clean air cleaner.
Adjust carburetor.
Fill crankcase with proper oil.
Remove blower housing and clean.
Adjust carburetor.
Adjust gap to .030".
Reset gap to .030" or replace spark plug.
Adjust carburetor.
Clean air cleaner.
Tighten blade and adapter. Balance blade.
Replace blade.
Set throttle between 3/4 and full throttle.
Do not mow when grass is wet; wait until
later to cut.
Mow once at a high cutting height, then
mow again at desired height or make a
narrower cutting swath (1/2 width).
Sharpen or replace blade.
Place all four wheels in same height
position.
Sharpen or replace blade.