ENGINE SURGES OR GALLOPS
ENGINE BACKFIRES THROUGH CARBURETOR
Carburetor flooded.
Waterr or dirt in gasoline.
Governor spring hooked into wrong hole in lever.
Engine cold.
Governor rod incorrectly adjusted. See `Governor Ad-
Poor grade of gasoline.
justment', Page B-18.
Sticky inlet valves.
ENGINE STOPS
Overheated valves.
Fuel tank empty.
Spark plugs too hot. See `Spark Plugs', Page B-17.
Water, dirt or gum in gasoline.
Hot carbon particles in engine.
Gasoline vaporized in fuel lines, due to excessive
LOW or NO OIL PRESSURE
heat around engine (Vapor Lock). See `Stopping En-
gine', Page B-11.
Oil pressure gauge. defective.
Vapor lock in fuel lines or carburetor due to using
Oil line to gauge clogged up.
winter gas (too volatile) in hot weather.
Crankcase oil supply low.
Air vent hole in fuel tank cap plugged. Engine scored
Faulty oil pump.
or stuck due to lack of oil.
Gears worn or broken.
Ignition troubles. See `Ignition', Page B-21.
Cover worn.
Wire from anti-diesel solenoid to starting switch dis-
Loose cover or body.
connected or damaged.
Gasket damaged.
Faulty relief valve,
ENGINE OVERHEATS
Clogged or leaky oil line connections.
Crankcase oil supply low, Replenish immediately.
Strainer screen clogged up.
Ignition spark timed wrong. See `Neon Lamp Timing',
Oil too thin due to dilution or too light of grade used.
Worn rod bearings.
Low grade of gasoline.
Engine overloaded.
Restricted cooling air circulation.
HIGH OIL PRESSURE
Part of air shroud removed from engine.
Oil pressure gauge defective.
Dirt between cooling fins on cylinder or head.
Oil too heavy.
Engine operated in confined space where cooling air
is continually recirculated, consequently becoming
Faulty relief valve.
too hot.
Clogged pressure line.
Carbon in engine.
Dirty or incorrect grade of crankcase oil.
INSTRUCTIONS FOR PROTECTING ENGINES
Restricted exhaust.
FOR WINTER OR SHORT STORAGE PERIODS
Engine operated while detonating due to low octane
gasoline, or heavy load at low speed.
To protect the cylinders, pistons, rings and valves
and keep them from rusting and sticking, a half and
half mixture of kerosene and good engine oil, (the
ENGINE KNOCKS
same kind of oil as used in the crankcase of the en-
gine), should be injected into the pipe tap opening
Poor grade of gasoline or of low octane rating. See
on the intake manifold while the engine is warm and
`Fuel', Page B-10.
running at moderate speed. About a quarter of a pint
Engine operating under heavy load at low speed.
is necessary, or enough so that a heavy bluish smoke
will appear at the exhaust. The ignition switch should
Carbon or lead deposits in cylinder head.
then be shut off and the engine stopped. This fogging
operation will leave a coating of oil on the above
Page B-15.
mentioned parts, protecting them from the atmosphere.
Loose or burnt out connecting rod bearing.
Drain crankcase oil while the engine is warm, as the
Engine overheated due to causes under previous
oil will flow more freely than when cold.
heading.
Drain fuel lines, carburetor, fuel pump and tank of all
Worn or loose piston pin.
gasoline, to prevent lead and gum sediment from in-
