Section 5: Troubleshooting - Cub Cadet 8354 Operator's Manual

SECTION 5: TROUBLESHOOTING

ENGINE TROUBLESHOOTING
When Engine is Difficult To Start
Cause
Fuel is thick and doesn't flow
Air or water mixed in fuel system
Thick carbon deposits on orifice of
injection nozzle
Valve clearance is wrong
Leaking valves
Fuel injection timing is wrong
Engine oil becomes thick in cold
weather and engine cranks slowly.
Low compression
Battery is discharged and the engine
will not crank
- Check the fuel tank and fuel filter.
- Remove water, dirt and other impurities.
- Check the fuel filter element for water, dirt , or other impurities, and
replace the filter if necessary.
- If air is in the fuel filter or injection lines, the fuel pump will not work
properly. To attain proper fuel injection pressure, check carefully for
loosened fuel cap nut, etc.
- Loosen air vent screw over fuel filter and fuel injection pump to eliminate
all the air in the fuel system.
- This is caused when water or dirt is mixed in the fuel. Clean the nozzle
injection piece, being careful not to damage the orifice.
- Check to see if nozzle is working properly. If not, install a new nozzle.
- Adjust valve clearance:
Intake — 0.0098 in. (0.25mm)
Exhaust — 0.0118 in. (0.3mm)
- Grind valve
- Adjust injection timing.
- The injection timing is 18° before top dead center.
- Change grade of oil according to the weather (ambient temperature).
- Bad valve or excessive wear of rings, pistons and liners cause
insufficient compression. Replace with new parts.
- Charge battery.
- In the winter, always remove battery from tractor, fully charge, and keep
indoors. Install in tractor at time of use.
50
Countermeasures