Troubleshooting - Yard-Man 604 series Operator's Manual

9
Trouble
Shooting
For repairs beyond
the minor adjust-
ments listed here,
contact an authorized
service dealer.
Problem
1. PTO engaged.
Engine fails to
start
2. Spark plug wire(s) disconnected.
3. Fuel tank empty or stale fuel.
4. Choke not activated.
5. Faulty spark plug.
6. Blocked fuel line.
7. Engine flooded.
8. Parking brake not engaged.
9. Throttle control lever not in correct starting
position.
1. Unit running with CHOKE applied.
Engine runs
erratic
2. Spark plug wire(s) loose.
3. Blocked fuel line or stale fuel.
4. Vent in gas cap plugged.
5. Water or dirt in fuel system.
6. Dirty air cleaner.
1. Engine oil level low.
Engine overheats
2. Air flow restricted.
1. Spark plug(s) gap too close.
Engine hesitates
at high RPM
Idles poorly 1. Spark plug(s) fouled, faulty, or gap too
wide.
2. Dirty air cleaner.
Excessive
1. Cutting blade loose or unbalanced.
Vibration
2. Damaged or bent cutting blade.
Mower will not 1. Engine speed too low.
mulch grass (If
2. Wet grass.
Equipped)
3. Excessively high grass.
4. Dull blade.
1. Deck not balanced properly.
Uneven cut
2. Dull blade.
3. Uneven tire pressure.
Cause
32
Remedy
1. Place PTO knob (or lever) in disengaged
(OFF) position.
2. Connect wire(s) to spark plug(s).
3. Fill tank with clean, fresh gasoline.
4. Pull out the CHOKE control (if equipped)
or place the throttle control in CHOKE
position.
5. Clean, adjust gap, or replace.
6. Clean fuel line or replace fuel filter, if
equipped.
7. Crank engine with throttle in FAST position.
8. Engage parking brake.
9. Place throttle lever to FAST position.
1. Push CHOKE control (if equipped) in, or
move the throttle control out of the CHOKE
position.
2. Connect and tighten spark plug wire(s).
3. Clean fuel line; fill tank with clean, fresh
(less than 30 days old) gasoline. Replace
fuel filter, if so equipped.
4. Clear vent or replace if damaged.
5. Drain fuel tank. Refill with fresh fuel.
6. Replace air cleaner cartridge/element or
clean pre-cleaner, if so equipped.
1. Fill crankcase with proper oil.
2. Clean grass clippings and debris from
around the engine's cooling fins and blower
housing.
1. Remove spark plug(s) and reset the gap.
1. Replace spark plug(s). Set plug(s) gap.
2. Replace air cleaner cartridge/element or
clean pre-cleaner, if so equipped.
1. Tighten blade and spindle. Balance blade.
2. Replace blade.
1. Place throttle in FAST (rabbit) position.
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 path.
4. Sharpen or replace blade.
1. Perform side-to-side deck adjustment.
2. Sharpen or replace blade.
3. Check tire pressure in all four tires.