Craftsman 917.270821 Owner's Manual page 32

_UBLESHOOTING CHART
PROBLEM
Los._of po'Rer (cont'd)
CAUSE
• 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.
Excessive vibration
Engine continues to
run when operator
leaves seat with at-
tachment clutch
en_aged
Poor cut - uneven
Mower blades will not
rotate
Poor grass discharge
-- - --
• Dirty engine air screen/fins.
• Dirty/clogged muffler.
• Loose or damaged wiring.
• Carburetor out of adjustment.
• Engine valves out of adjust-
ment.
• Worn, bent or loose blade.
• Bent blade mandrel.
• Loose/damaged part(s).
• Faulty operator-safety pres-
ence 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
--.holes from buildup of
grass, leaves, and trash
around mandrels.
• Obstruction in clutch mecha-
nism.
• Worn/damaged mower drive
belt.
• Frozen idler pulley.
• Frozen blade mandrel.
• Engine speed too slow.
• Travel speed too fast.
• Wet grass.
CORRECTION
• Clean underside of mower hous-
ing.
• 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 carburetor,
refill tank with fresh gasoline and
replace fuel filter.
• Connect and tighten spark plug
wire.
• Clean engine-air screen/tins.
• Clean/replace muffler.
• Check all wiring.
• See "ToAdjust Carburetor" in
Service and Adjustments
section.
• Contact an authorized service
center.
• Replace blade. Tighten blade
bolt.
• Replace blade mandrel.
• Tighten loose part(s). Replace
• dama_led parts.
• Check wiring, switches and con-
nections. If not
corrected, contact an authorized
service center/
department.
• Replace blade. Tighten blade
bolt.
• Level mower deck.
• Clean underside of mower hous-
ing.
• Replace blade mandrel.
• Clean around mandrels to open
vent holes.
• Remove obstruction.
• Replace mower drive belt.
• Replace idler pulley.
• Replace blade mandrel.
• Place throttle control in =FAST"
position.
• •Shift to slower speed.
• Allow grass to dry before mow-
ing.
32