Troubleshooting - Husqvarna 55R21HV Owner's Manual

TROUBLESHOOTING POINTS
CORRECTION PROBLEM
Does not start
Loss of power
CAUSE
1. Dirty air filter.
2. Out of fuel.
3. Stale fuel.
4. Water in fuel.
5. Spark plug wire is disconnected.
6. Bad spark plug.
7. Loose blade or broken blade adapter.
8. Control bar in released position.
9. Control bar defective.
10. Fuel valve lever (if equipped) in OFF position.
11. Weak battery (if equipped).
12. Disconnected battery connector (if equipped).
1. Rear of lawn mower housing or cutting
blade dragging in heavy grass.
2. Cutting too much grass.
3. Dirty air filter.
4. Buildup of grass, leaves and trash under
mower.
Too much oil in engine.
Walking speed too fast.
1. Clean/replace air filter.
2. Fill fuel tank.
3. Empty fuel tank and refill tank with fresh,
clean gasoline.
4. Empty fuel tank and refill tank with fresh,
clean gasoline.
5. Connect wire to plug.
6. Replace spark plug.
7. Tighten blade bolt or replace blade adapter.
8. Depress control bar to handle.
9. Replace control bar.
10. Turn fuel valve lever to the ON position.
11. Charge battery.
12. Connect battery to engine.
1. Raise cutting height.
2. Raise cutting height.
3. Clean/replace air filter.
4. Clean underside of mower housing.
5. 5. Check oil level.
6. 6. Cut at slower walking speed.
Poor cut- 1. Worn, bent or loose blade. 1. Replace blade.Tighten blade bolt.
uneven 2. Wheel heights uneven. 2. Set all wheels at same height.
3. Buildup of grass, leaves and trash under 3. Clean underside of mower housing.
mower.
Excessive 1. Worn, bent or loose blade. 1. Replace blade. Tighten blade bolt.
vibration 2. Bent engine crankshaft. 2. Contact a qualified service center.
Starter rope 1. 1.
hard to pull
Engine flywheel brake is on when control
bar is released.
2. Bent engine crankshaft.
3. Blade adapter broken.
4. Blade dragging in grass.
1. Cutting height too low.
2. Lift on blade worn off.
3. Catcher not venting air.
1. Grass is too high or wheel height is too low.
2. Rear of lawn mower housing or cutting
blade dragging in heavy grass.
3. Grass catcher too full.
4. Handle height position not right for you.
1. Belt wear.
2. Belt off of pulley.
3. Drive cable worn or broken.
4. "Loose" drive control system.
Grass catcher
not filling
(if so equipped)
Hard to push
Loss of drive
(or slowing of
drive speed)
2.
3.
4.
Depress control bar to upper handle before
pulling starter rope.
Contact a qualified service center.
Replace blade adapter.
Move lawn mower to cut grass or other
hard surface before starting.
1. Raise cutting height.
2. Replace blade.
3. Clean grass catcher.
1. Raise cutting height.
2. Raise rear of lawn mower housing one (1)
setting higher.
3. Empty grass catcher.
4. Adjust handle height to suit.
1. Check/replace drive belt.
2. Check/reinstall drive belt.
3. Put belt on pulleys / replace belts if broken.
4. Adjust drive control.
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