Oil Dilution Or Uses Too Much Oil; Using Too Much Fuel; No Fuel At Carburetor; Ignition And Electrical - International Harvester Company CUB Operator's Manual

TROUBLE SHOOTING
Possible Cause
Possible Remedy
OIL DILUTION OR USES TOO MUCH OIL
Oil of incorrect viscosity. See the "Lubrication Table" on page 65.
Leaks in oil lines or filter or in oil pan
plug or gasket. Check and tighten. *
Worn piston or oil rings. *
Loose connecting rod bearings. *
Long engine idling. Stop the engine.
Engine overheating or too cold. See "Lack of Power" and "Engine Overheats";
see page 57.
Enginespeedtoohigh *
Crankcase breather clogged. Clean. See page 61.
USING TOO MUCH FUEL
Fuel mixture too rich. Carbureto1" out of
adjustment. Check choke and see "Carburetor" on page 11.
Fuel leaks. Tighten or replace the fuel lines or fuel strainer
gasket.
Poor grade of fuel Use a good grade of gasoline.
Choke closed. Investigate for the choke not operating.
Engine overloaded. Reduce the load or shift to a lower speed.
Poor compression *
Faulty ignition. *
Engine not operating at proper temperature. ..Check the cooling system. Check the lubricating
oil. *
Air cleaner clogged. Service the air cleaner; see pages 24 and 25.
Wrong viscosity or amount of lubricating oil. ..See the "Lubrication Table" on page 65 and
keep the oil up to the proper level.
NO FUEL AT CARBURETOR
Fuel low in tank. Fill the fuel tank and check the fuel lines.
Air vent hole in fuel tank cap plugged up Clean out the vent hole.
Fuel valve closed or partly open. Open the valve; see the starting instructions.
Dirty or clogged fuel strainer screen or line. ..Clean as instructed on poge 10.
IGNITION AND ELECTRICAL
Wrong kind, old, cracked, dirty, or
poorly set spark plugs. Clean and set the gaps to .023 inch, or replace
with new plugs.
Loose wiring or improper connections. Check the wiring to see that all connections are
clean and tight; see pages 35 to 41.
Distributor and coil unit or magneto not
timed correctly. Retime as instructed on pages 27 to 31.
Distributor cap or rotor or breaker
chamber dirty. Clean as instructed on pages 30 and 31.
Breaker points dirty, pitted or im-
properly set. Clean and reset the opening or replace with new
points; on pages 30 and 31.
Breaker arm stuck, weak or broken spring. ...Check and replace; see pages 30 and 31.
Impulse coupling dirty (tractors with
magneto). Clean and lubricate as instructed an page 28.
* See your International Harvester dealer.
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