Troy-Bilt 772C0748 Lawn Mower User Manual


 
27
If the machine is to be inoperative for a period longer
than 30 days, prepare for storage as follows.
Clean the engine and the entire unit thoroughly.
Lubricate all lubrication points. Wipe the entire
machine with an oiled rag to protect the painted
metal surfaces.
Refer to the engine manual for correct engine
storage instructions. The engine must be
completely drained of fuel to prevent gum deposits
from forming on essential carburetor parts, fuel
lines and fuel tanks.
It is not necessary to remove the battery from the
tractor for storage. However, clean the top of the
battery and make sure it has full charge.
Disconnect the negative terminal of the battery
before storing the tractor.
Store unit in a clean, dry area.
NOTE: When storing any type of power equipment in
an unventilated or metal storage shed, care should be
taken to rustproof the equipment. Using a light oil or
silicone, coat the equipment, especially any chains,
springs, bearings and cables.
NOTE: Recharge the battery before returning it to
service after storage. Even if the tractors starts, the
engine charging system may not bring the battery upto
a full charge, unless it is recharged.
SECTION 12: TROUBLESHOOTING
Trouble Possible Cause(s) Corrective Action
Engine fails to start PTO lever engaged.
Parking brake not engaged.
Spark plug wire(s) disconnected.
Throttle control not in correct position
Choke not activated.
Fuel tank empty, or stale fuel.
Blocked fuel line.
Faulty spark plug.
Engine flooded.
Place PTO lever in disengaged (Blade Stop) position.
Engage parking brake.
Connect wire(s) to spark plug.
Place throttle lever to fast or choke (if so equipped).
Activate choke.
Fill tank with clean, fresh (less than 30 days old) gas.
Clean fuel line or replace fuel filter, if so equipped.
Clean, adjust gap or replace plug.
Crank engine with throttle in FAST position.
Engine runs erratic Unit running with CHOKE applied.
Spark plug wire loose.
Blocked fuel line or stale fuel.
Vent in gas cap plugged.
Water or dirt in fuel system.
Dirty air cleaner.
Place throttle lever in FAST position.
Connect and tighten spark plug wire.
Clean fuel line; fill tank with clean, fresh (less than 30 days old)
gasoline. Replace fuel filter, if so equipped.
Clear vent or replace cap if damaged.
Drain fuel tank. Refill with clean, fresh (less than 30 days old)
gasoline.
Replace air cleaner cartridge/element or clean pre-cleaner, if
so equipped.
Engine overheats Engine oil level low.
Air flow restricted.
Fill crankcase with proper capacity and weight of oil.
Clean grass clippings and debris from around the engine’s
cooling fins and blower housing.
Engine hesitates at high
RPM
Spark plug gap too close. Remove spark plug and reset the gap to .030”.
Idles poorly Spark plug fouled, faulty or gap too
wide.
Dirty air cleaner.
Replace spark plug. Set plug gap to .030”.
Replace air cleaner cartridge/element or clean pre-cleaner, if
so equipped.
Excessive vibration Cutting blade loose or unbalanced or
damaged.
Tighten blade and spindle. Balance blade.
Replace blade.
Mower will not mulch
grass
Engine speed low.
Wet grass.
Excessively high grass.
Dull blade.
Place throttle in FAST position.
Do not mow when grass is wet; wait until later to cut.
Mow once at a higher cutting height, then mow again at desired
height or make a narrower cutting swath.
Sharpen or replace blade.
Uneven cut Deck not balanced properly.
Dull blade.
Uneven tire pressure.
Perform side-to-side deck adjustment.
Sharpen or replace blade.
Check tire pressure in all four tires.