Husqvarna 55B21HV owner manual Troubleshooting Points, Problem Cause Correction

Page 18

TROUBLESHOOTING POINTS

PROBLEM

 

CAUSE

 

CORRECTION

 

 

 

 

 

Does not start

1.

Dirty air fi lter.

1.

Clean/replace air fi lter.

 

2.

Out of fuel.

2.

Fill fuel tank.

 

3.

Stale fuel.

3.

Empty fuel tank and refi ll tank with fresh,

 

 

 

 

clean gasoline.

 

4.

Water in fuel.

4.

Empty fuel tank and refi ll tank with fresh,

 

 

 

 

clean gasoline.

 

5.

Spark plug wire is disconnected.

5.

Connect wire to plug.

 

6.

Bad spark plug.

6.

Replace spark plug.

 

7.

Loose blade or broken blade adapter.

7.

Tighten blade bolt or replace blade adapter.

 

8.

Control bar in released position.

8.

Depress control bar to handle.

 

9.

Control bar defective.

9.

Replace control bar.

 

10.

Fuel valve lever (if equipped) in OFF position.

10.

Turn fuel valve lever to the ON position.

 

11.

Weak battery (if equipped).

11.

Charge battery.

 

12.

Disconnected battery connector (if equipped).

12.

Connect battery to engine.

 

13.

Engine control lever is in STOP position.

13.

Place engine control lever in FAST position.

 

 

 

 

 

Loss of power

1.

Rear of lawn mower housing or cutting

1.

Raise cutting height.

 

 

blade dragging in heavy grass.

 

 

 

2.

Cutting too much grass.

2.

Raise cutting height.

 

3.

Dirty air fi lter.

3.

Clean/replace air fi lter.

 

4.

Buildup of grass, leaves, trash under mower.

4.

Clean underside of mower housing.

 

5.

Too much oil in engine.

5.

Check oil level.

 

6.

Walking speed too fast.

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, trash under mower.

3.

Clean underside of mower housing.

 

 

 

 

 

Excessive

1.

Worn, bent or loose blade.

1.

Replace blade. Tighten blade bolt.

vibration

2.

Bent engine crankshaft.

2.

Contact a qualifi ed service center.

 

 

 

 

 

Starter rope

1.

Engine fl ywheel brake is on when control

1.

Depress control bar to upper handle before

hard to pull

 

bar is released.

 

pulling starter rope.

 

2.

Bent engine crankshaft.

2.

Contact a qualifi ed service center.

 

3.

Blade adapter broken.

3.

Replace blade adapter.

 

4.

Blade dragging in grass.

4.

Move lawn mower to cut grass or other

 

 

 

 

hard surface before starting.

 

5.

Defective Blade/Brake Control.

5.

Replace Blade/Brake Control.

 

 

 

 

 

Grass catcher

1.

Cutting height too low.

1.

Raise cutting height.

not filling

2.

Lift on blade worn off.

2.

Replace blade.

(if so equipped)

3.

Catcher not venting air.

3.

Clean grass catcher.

 

 

 

 

 

Hard to push

1.

Grass is too high or wheel height is too low.

1.

Raise cutting height.

 

2.

Rear of lawn mower housing or cutting

2.

Raise rear of lawn mower housing one (1)

 

 

blade dragging in heavy grass.

 

setting higher.

 

3.

Grass catcher too full.

3.

Empty grass catcher.

 

4.

Handle height position not right for you.

4.

Adjust handle height to suit.

 

 

 

 

 

BBC does

1.

Defective Blade/Brake Control.

1.

Replace Blade/Brake Control.

not engage

 

 

 

 

 

 

 

 

 

Loss of drive

1.

Belt wear.

1.

Check/replace drive belt.

(or slowing of

2.

Belt off of pulley.

2.

Check/reinstall drive belt.

drive speed)

3.

Drive cable worn or broken.

3.

Put belt on pulleys / replace belts if broken.

 

4.

“Loose” drive control system.

4.

Adjust drive control.

 

 

 

 

 

18

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Contents 55B21HV General Operation IV. ServiceSafe Operation Practices for Walk-Behind Mowers III. ChildrenTable of Contents To Remove Lawn Mower from Carton AssemblyHOW to SET UP Your Lawn Mower To Unfold Handle See FigsTo Install Attachments To Assemble Grass Catcher See FigsMeets Cpsc Safety Requirements OperationKnow Your Lawn Mower Throttle / Engine Control See Fig HOW to USE Your Lawn MowerDrive Control Adjustment See Fig Blade Control See FigTo Adjust Cutting Height See Fig To Convert Mower See Figs thruSimple Steps to Remember When Converting Your Lawn Mower To Empty Grass Catcher See FigsADD Gasoline See Fig Before Starting EngineADD OIL See Figs To Stop EngineMowing Tips Mulching Mowing TipsGeneral Recommendations MaintenanceLubrication Chart Before Each USELawn Mower EngineService and Adjustments CleaningTo Remove Drive Belt See Figs To Replace Drive Belt See FigsEngine Speed To Adjust Handle See FigStorage CarburetorFuel System OtherHandle See Figs Engine OILTroubleshooting Points Problem Cause CorrectionGear Case Assembly - Part Number 532 18 Rotary Lawn Mower - Model Number 55B21HV 55B21HVAKEY Part Description Page KEY Part Description Page 532 19 Statementwarranty