Off-Season Storage; Troubleshooting - MTD 640 Operator's Manual

SECTION 8: OFF-SEASON STORAGE
WARNING:
in tank indoors or in enclosed, poorly
ventilated areas where fuel fumes may
reach an open flame, spark or pilot light as
on a furnace, water heater, clothes dryer, or
other gas appliance.
• If unit is to be stored over 30 days, prepare the
engine for storage following instructions in the
engine manual.
SECTION 9: TROUBLE SHOOTING GUIDE
Trouble Possible Cause(s)
Engine fails to start Fuel tank empty, or stale fuel.
Blocked fuel line.
Choke not in ON position
Faulty spark plug.
Key not in switch on engine.
Spark plug wire
disconnected.
Primer button not depressed.
Fuel shut-off valve closed
(if so equipped).
Engine runs erratic Unit running on CHOKE.
Blocked fuel line or stale fuel.
Water or dirt in fuel system.
Carburetor out of adjustment.
Loss of power Spark plug wire loose.
Gas cap vent hole plugged.
Exhaust port plugged.
Engine overheats Carburetor not adjusted
properly.
Incorrect fuel mixture.
Excessive vibration Loose parts or damaged auger. Stop engine immediately and disconnect spark plug wire. Tighten all
Unit fails to propel Incorrect adjustment of drive
itself cable.
Drive belt loose or damaged.
Unit fails to Discharge chute clogged.
discharge snow
Foreign object lodged in auger.
Incorrect adjustment of drive
cable.
Drive belt loose or damaged.
Shear bolt(s) sheared
NOTE: For repairs beyond the minor adjustments listed above, contact your nearest authorized service dealer or
call 1-800-800-7310 for the Customer Support Center. Refer to separate engine manual packed with your snow
thrower for more engine related information.
Never store engine with fuel
• Remove all dirt from exterior of engine and
equipment.
• Follow lubrication recommendations on page 11.
NOTE: When storing any type of power equipment in
an poorly ventilated or metal storage shed, care
should be taken to rustproof the equipment,
especially springs, cables and all moving parts.
Corrective Action
Fill tank with clean, fresh gasoline. Fuel may not last over thirty days
unless a fuel stabilizer is used.
Clean fuel line.
Move switch to ON position
Clean, adjust gap or replace.
Insert key.
Connect spark plug wire.
Refer to the engine manual packed with your unit.
Open fuel shut-off valve.
Move choke lever to OFF position.
Clean fuel line; fill tank with clean fresh gasoline. Fuel may not last
over thirty days unless a fuel stabilizer is used.
Drain fuel tank. Refill with fresh fuel.
Refer to the engine manual packed with your unit or have carburetor
adjusted by an authorized service dealer.
Connect and tighten spark plug wire.
Remove ice and snow from cap. Be certain vent hole is clear.
Clean-see Maintenance section of engine manual.
Refer to the engine manual packed with your unit or have carburetor
adjusted by an authorized service dealer.
Drain fuel tank. Refill with proper fuel mixture.
bolts and nuts. Make all necessary repairs. If vibration continues, have
unit serviced by an authorized service dealer.
Adjust drive cable. Refer to Adjustment section of this manual.
Replace drive belt. Refer to Belt Replacement on page 12.
Stop engine immediately and disconnect spark plug wire. Clean dis-
charge chute and inside of auger housing.
Stop engine immediately and disconnect spark plug wire. Remove
object from auger.
Adjust drive cable. Refer to Adjustment section of this manual.
Replace drive belt. Refer to Belt Replacement on page 12.
Replace shear bolt(s)
14