O.S. Engines 21VG-PX - Manual (Page 10)

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STARTING THE ENGINE & RUNNING-IN ('Breaking-in)
PRESSURIZED FUEL SYSTEM
Before starting the engine, always check the
tightness of all the screws and nuts especial-
ly those of joint and movable parts such as
throttle arm. Missing retightening the loose
screws and nuts often causes the parts
breakage that is capable of harming you.
Never run your vehicle without installing the air
cleaner. Dust and dirt that may otherwise be drawn
into the engine will rapidly shorten its life.
The somewhat violent changes of vehicle attitude
that occur in off-road running, combined with the
fact that, in buggy type cars, the fuel tank is often
located some distance from the carburetor, means
that fuel 'head' at the carburettor can vary and upset
running.Therefore,it is recommended that a muffler
pressurized fuel feed system be used.
Running- in is a procedure for an engine to come
close to actual running conditions (fuel, r.p.m.,
engine temperature, etc.).
Excessively rich running and prolonged low
speed running should be avoided. Prolonged low
speed running and low temperature running may
result in the oil in the fuel being gelled and
piston/liner being stuck together.
Please do not run on a public street, this
could cause serious accidents, personal
injuries and/or propetry damage.
Please do not run near pedestrians or small
children.
Please do not run in small or confined areas.
Please do not run where loud noises can disturb
others, such as hospitals and residential areas.
While Operating
RUNNING-IN ('Breaking-in)
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Lay the chassis on a stand and start the engine so
that the tires are not in contact with the ground.
The following procedure is suitable when a fuel
containing up to 30% nitromethane is used.
Fill the tank completely with fuel.
Temporarily remove the glowplug to check that it
glows bright red when energized.
Glow Plug Igniter
Pliers
Element glows when
energized.
Replace the plug when the
element does not glow or is
burnt out.
Fuel Pump
Fuel Tank
Do not hold a glowplug with fingers and use
pliers when checking the brightness. Do not
have your face close to the glowplug or boiled
fuel remaining in the coil will burn you.
stand
NOTE:
Be careful not to damage the plug threads when
holding a glowplug with pliers.