TROUBLESHOOTING CHART:

See appropriate section in manual unless directed to a service center

 

PROBLEM

CAUSE

CORRECTION

 

 

 

 

 

 

 

Loss of power

6.

Faulty spark plug.

6.

Clean and regap or change

 

(continued)

 

 

 

spark plug.

 

 

7.

Dirty fuel filter.

7.

Replace fuel filter.

 

 

8.

Stale or dirty fuel.

8.

Empty fuel tank and refill tank

 

 

 

 

 

with fresh, clean gasoline.

 

 

9.

Water in fuel.

9.

Empty fuel tank and carbure-

 

 

 

 

 

tor, refill tank with fresh gas-

 

 

 

 

 

oline and replace fuel filter.

 

 

10. Spark plug wire loose.

10. Connect and tighten spark

 

 

 

 

 

plug wire.

 

 

11. Dirty engine air screen/fins.

11. Clean engine air screen/fins.

 

 

12. Dirty/clogged muffler.

12. Clean/replace muffler.

 

 

13. Loose or damaged wiring.

13. Check all wiring.

 

 

14. Carburetor out of adjustment.

14. See “To Adjust Carburetor”

 

 

 

 

 

in Service and Adjustments

 

 

 

 

 

section.

 

 

15. Engine valves out of

15. Contact a qualified service

 

 

 

adjustment.

 

center.

 

 

 

 

 

 

 

Excessive

1.

Worn, bent or loose blade.

1.

Replace blade. Tighten blade

 

vibration

 

 

 

bolt.

 

 

2.

Bent blade mandrel.

2.

Contact a qualified service

 

 

 

 

 

center.

 

 

3.

Loose/damaged part(s).

3.

Tighten loose part(s).

 

 

 

 

 

Replace damaged parts.

 

 

 

 

 

 

 

Engine dies when

1.

Reverse operation system

1.

Turn ignition key to

 

tractor is shifted

 

(ROS) is not "ON" while

 

ROS "ON" position.

 

into reverse

 

mower or other attachment

 

See Operation section.

 

 

 

is engaged.

 

 

 

 

 

 

 

 

 

Engine continues

1.

Faulty operator-safety

1.

Check wiring, switches and

 

to run when

 

presence control system.

 

connections. If not corrected,

 

operator leaves

 

 

 

contact a qualified service

 

seat with

 

 

 

center.

 

attachment

 

 

 

 

 

clutch engaged

 

 

 

 

 

 

 

 

 

 

 

Poor cut - uneven

1.

Worn, bent or loose blade.

1.

Replace blade. Tighten blade

 

 

 

 

 

bolt.

 

 

2.

Mower deck not level.

2.

Level mower deck.

 

 

3.

Buildup of grass, leaves, and

3.

Clean underside of mower

 

 

 

trash under mower.

 

housing.

 

 

4.

Bent blade mandrel.

4.

Contact a qualified service

 

 

 

 

 

center.

 

 

5.

Clogged mower deck vent

5.

Clean around mandrels to

 

 

 

from build-up of grass, leaves,

 

open vent holes.

 

 

 

and trash around mandrels.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29

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Husqvarna LOYTH20F42T manual Excessive