Bolens 112-428R372 - Manual (Page 16)

TROUBLE SHOOTING GUIDE
Trouble Possible Cause( >) Corrective Action
Engine fails to start 1. Blade control h andle disengaged.
2. Spark plug win; disconnected.
3. Throttle contro lever not in CHOKE
or START position.
4. Fuel tank empi y, or stale fuel.
5. Blocked fuel lir e (if so equipped).
6. Faulty spark pi ug.
7. Engine floodec.
1. Engage blade control handle.
2. Connect wire to spark plug.
3. Move throttle lever to CHOKE or
START position.
4. Fill tank with clean, fresh gasoline.
5. Clean fuel line.
6. Clean, adjust gap or replace.
7. Remove spark plug, dry the plug, and
crank engine with plug removed and
throttle in off position. Replace spark
plug, connect wire and resume starting
procedures.
Engine runs erratic 1. Unit running in CHOKE or START
position.
2. Spark plug wir3 loose.
3. Blocked fuel lii le (if so equipped) or
stale fuel.
4. Vent in gas ca3 plugged.
5. Water or dirt ir fuel system.
6. Dirty air cleanor.
7. Carburetor ou of adjustment.
1. Move throttle lever to FAST
position.
2. Connect and tighten spark plug wire.
3. Clean fuel line; fill tank with clean,
fresh gasoline.
4. Clear vent.
5. Drain fuel tank. Refill with fresh fuel.
6. Clean air cleaner.f
7. Adjust carburetor.f
Engine overheats 1. Engine oil leve 1 low.
2. Airflow restric:ed.
3. Carburetor no adjusted properly.
1. Fill crankcase with proper oil.
2. Remove blower housing and clean.f
3. Adjust carburetor.f
Occasional skip
(hesitates) at high speed
1. Spark plug ga) too close.
2. Carburetor idh; mixture adjustment
improperly sel.
1. Adjust gap to .030"
2. Adjust carburetor.f
Idles poorly 1. Spark plug foi led, faulty or gap too wide.
2. Carburetor im 3roperly adjusted.
3. Dirty air clean 3r.
1. Reset gap to .030" or replace spark plug.
2. Adjust carburetor.f
3. Clean air cleaner.f
Excessive vibration 1. Cutting blade oose or unbalanced.
2. Bent cutting b ade.
1. Tighten blade and adapter.
Balance blade.
2. Replace blade.
Mower will not
discharge grass
1. Engine speed too low.
2. Wet grass.
3. Excessively h gh grass.
1. Set throttle between 3/4 and full throttle.
2. Do not mow when grass is wet; wait until
later to cut.
3. Mow once at a high cutting height, then
mow again at desired height or make a
narrower cutting swath (1/2 width).
Uneven cut 1. Wheels not p )sitioned correctly.
2. Dull blade.
1. Place all four wheels in same height
position.
2. Sharpen or replace blade.
tRefer to separate engine manual packed with your unit.
Note: For repairs beyond the minor adjustments li ;ted above, contact your local authorized service dealer.
FOR REPLACEMENT PARTS, CONTACT:
SERVICE DEPARTMENT • P.O. BOX 360900 • CLEVELAND, OHIO 44136