Craftsman 917.270762 Owner's Manual page 30

TROUBLESHOOTING CHART
CAUSE CORRECTION
PROBLEM
Loss of power
(Continued)
Excessive
vibration
Engine continues
to run when
operator leaves
seat with
attach ment
clutch engaged
Poor cut - uneven
Mower blades will
not rotate
• Build-up of grass, leaves
and trash under mower.
• Dirty air filter.
• Low oil level/dirty oil.
• Faulty spark plug.
• Dirty fuel filter.
• Stale or dirty fuel.
• Water in fuel.
• Spark plug wire loose.
• Dirty engine air screen/fins.
• Dirty/clogged muffler.
• Loose or damaged wiring.
• Carburetor out of
adjustment.
• Engine valves out of
adjustment.
• Worn, bent or loose blade.
• Bent blade mandrel.
• Loose/damaged part(s).
• Faulty operator-safety
presence control system.
• Worn, bent or loose blade.
• Mower deck not level.
• Buildup of grass, leaves,
and trash under mower.
• Bent blade mandrel.
• Clogged mower deck vent
from build-up of grass,
leaves, and trash around
mandrels.
• Obstruction in clutch
mechanism.
• Worn/damaged mower
drive belt.
• Frozen idler pulley.
• Frozen blade mandrel.
• Clean underside of mower
housing.
• Clean/replace air filter.
• Check oil level/change oil.
• Clean and regap or change
spark plug.
• Replace fuel filter.
• Drain fuel tank and refill with
fresh gasoline.
• Drain fuel tank and carbure-
tor, refill tank with fresh
gasoline and replace fuel
filter.
• Connect and tighten spark
plug wire.
• Clean engine air screen/
fins.
• Clean/replace muffler.
• Check all wiring.
• See "To Adjust Carburetor"
in Service Adjustments
section.
• Contact an authorized
service center/department.
• Replace blade.
Tighten blade bolt.
• Replace blade mandrel.
• Tighten loose part(s).
Replace damaged parts.
• Check wiring, switches and
connections. If not corrected,
contact an authorized
service center/department.
• Replace blade. Tighten
blade bolt.
• Level mower deck.
• Clean underside of mower
housing.
• Replace blade mandrel.
• Clean around mandrels to
open vent holes.
• Remove obstruction.
• Replace mower drive belt.
• Replace idler pulley.
• Replace blade mandrel.
3O