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Engine
continues to
run when
operator
leaves seat
1. Faulty operator-presence safety switch. 1. Contact your Gravely Dealer.
Engine
“backfires”
when turning
engine “OFF”
1. Engine throttle control not set at
“SLOW” position for 30 seconds before
stopping engine.
1. Move throttle control to “SLOW”
position and allow to idle for 30
seconds before stopping engine.
Excessive
vibration
1. Worn, bent or loose blade(s).
2. Bent blade mandrel.
3. Loose/damaged parts.
1. Replace blade(s). Tighten blade bolt.
2. Replace blade mandrel.
3. Tighten loose part(s). Replace
damaged parts.
Headlight not
working
(Optional)
1. Bulb(s) burned out.
2. Loose or damaged wiring.
3. Blown fuse.
1. Replace bulb(s).
2. Check wiring and connections.
3. Replace fuse.
Battery will
not charge
1. Bad battery cell(s).
2. Poor cable connections.
3. Faulty regulator.
4. Faulty alternator
1. Replace battery.
2. Check/clean all connections.
3. Contact your Gravely Dealer.
4. Contact your Gravely Dealer.
Mower blades
will not rotate
1. Obstruction in clutch mechanism.
2. Worn/damaged mower drive belt.
3. Frozen idler pulley.
4. Frozen blade mandrel.
1. Remove obstruction.
2. Replace mower drive belt.
3. Replace idler pulley.
4. Replace blade mandrel.
Uneven cut or
poor grass
discharge
1. Worn, bent or loose blade(s).
2. Mower deck not level.
3. Buildup of grass, leaves, and trash
under mower.
4. Bent blade mandrel.
5. Engine speed too slow.
6. Travel speed too fast.
7. Wet grass.
8. Low/uneven tire pressure.
9. Blades improperly installed.
10. Improper blades used.
1. Replace blade(s). Tighten blade bolt.
2. Level mower deck.
3. Clean underside of mower.
4. Replace blade mandrel.
5. Place throttle control in “FAST”
position.
6. Slow down.
7. Allow grass to dry before mowing.
8. Check tires for proper air pressure.
9. Reinstall blades sharp edge down.
10. Replace with correct blades.
Unit does not
track straight
1. Improper air pressure in tires.
2. Eccentrics out of alignment.
1. Check and adjust tire pressure. DO
NOT exceed maximum recommended
tire pressure. (See Specifications.)
2. See "Adjusting the Unit to Track
Straight" in Adjustments Section.
PROBLEM CAUSE
CORRECTION