TROUBLESHOOTING CHART:

See appropriate section in manual unless directed to Sears service center

 

PROBLEM

CAUSE

CORRECTION

 

 

 

 

 

 

 

 

 

Loss of power

1.

Cutting too much grass/too

1.

Raise cutting height/reduce

 

 

 

 

fast.

 

speed.

 

 

 

2.

Throttle in “CHOKE” position.

2.

Adjust throttle control.

 

 

 

3.

Build-up of grass, leaves

3.

Clean underside of mower

 

 

 

 

and trash under mower.

 

housing.

 

 

 

4.

Dirty air fi lter.

4.

Clean/replace air fi lter.

 

 

 

5.

Low oil level/dirty oil.

5.

Check oil level/change oil.

 

 

 

6.

Faulty spark plug.

6.

Clean and regap or change

 

 

 

 

 

 

spark plug.

 

 

 

7.

Dirty fuel filter.

7.

Replace fuel fi lter.

 

 

 

8.

Stale or dirty fuel.

8.

Empty fuel tank and refi ll tank

 

 

 

 

 

 

with fresh, clean gasoline.

 

 

 

9.

Water in fuel.

9.

Empty fuel tank and carbure-

 

 

 

 

 

 

tor, refi ll tank with fresh gas-

 

 

 

 

 

 

oline and replace fuel fi lter.

 

 

 

10. Spark plug wire loose.

10. Connect and tighten spark

 

 

 

 

 

 

plug wire.

 

 

 

11. Dirty engine air screen/fi ns.

11. Clean engine air screen/fi ns.

 

 

 

12. Dirty/clogged muffl er.

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 Sears or other

 

 

 

 

adjustment.

 

qualifi ed service center.

 

 

 

 

 

 

 

 

 

Excessive

1.

Worn, bent or loose blade.

1.

Replace blade.

 

 

vibration

 

 

 

Tighten blade bolt.

 

 

 

2.

Bent blade mandrel.

2.

Contact a Sears or other

 

 

 

 

 

 

qualifi ed 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 Sears or other

 

 

seat with attach-

 

 

 

qualifi ed service center.

 

 

ment 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,

3.

Clean underside of mower

 

 

 

 

and trash under mower.

 

housing.

 

 

 

4.

Bent blade mandrel.

4.

Contact a Sears or other

 

 

 

 

 

 

qualifi ed service center.

 

 

 

5.

Clogged mower deck vent

5.

Clean around mandrels to

 

 

 

 

holes from buildup of grass,

 

open vent holes.

 

 

 

 

leaves, and trash around

 

 

 

 

 

 

mandrels.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

29

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Craftsman 917.27581 owner manual Excessive