MTD 645C thru 650C - Manual (Page 10)

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TROUBLE SHOOTING
PROBLEM POSSIBLE CAUSE!S) CORRECTIVE ACTION
Engine fails to start 1. Fuel tank empty, or stale fuel.
2. Spark plug wire cisconnected.
3. Faulty spark plug 1. Fill tank with clean, fresh fuel.
2. Connect wire to spark plug.
3. Clean, adjust gap or replace.
Loss of power;
operation erratic 1. Spark plug wire loose.
2. Unit running on C HOKE.
3. Blocked fuel line or stale fuel.
4. Fuel shut-off valv
3 closed
(if so equipped).
5. Water or dirt in fu el system.
6. Carburetor out of adjustment.
7. Dirty air cleaner.
1. Connect and tighten spark plug wire.
2. Move choke lever to OFF position.
3. Clean fuel line; fill tank with clean
fresh gasoline.
4. Open fuel shut-off valve.
5. Disconnect fuel line at carburetor to drain fuel
tank. Refill with fresh fuel.
6. Adjust carburetor.t
7. Service air cleaner.f
Engine overheats 1. Carburetor not a( ljusted
properly.
2. Engine oil level k iw.
1. Adjust carburetor.t
2. Fill crankcase with proper oil.
Too much vibration Loose parts or d< imaged
impeller. Stop engine immediately and disconnect
spark plug wire. Tighten all bolts and nuts.
Make all necessary repairs. If vibration continues,
have unit serviced by an authorized service
dealer.
Unit does not
discharge 1. Discharge chute blogged.
2. Foreign object lo dged in impeller.
1. Stop engine immediately and disconnect
spark plug wire. Clean flail screen and inside
of housing. See Maintenance section of this
manual.
2. Stop engine immediately and disconnect
spark plug wire. Remove lodged object.
Rate of discharge
slows considerably or
composition of
discharged material
changes Shredding blade and/or chipper
blades dull. Sharpen or replace shredding and chipper
blades.
tRefer to the engine manual packed with your unit.
NOTE: For repairs beyond the minor adjustments isted above, please contact your nearest authorized service dealer.
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