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c. The glowplug may also be too wet. Start the engine
without the glowplug in place, for about 5sec, with
the throttle fully open. Fuel will escape through the
glowplug hole in the cylinder head; place a towel over
the cylinder head while doing this to avoid getting
fuel over everything. Close the main needle ¼ turn.
Reinstall the glowplug and try to start the engine
again.
6. Once the engine has started, apply a bit of throttle and
allow the engine to warm up to operating temperature
(approximately 1min). This is an important routine that
you should always follow. The internal parts need to
receive lubrication and reach operating temperature.
BREAK-IN PROCESS
A nitro-powered engine requires careful break-in the first
time the engine is used to allow the internal parts to
achieve proper operating clearances. This is especially true
of the piston/cylinder, crankshaft, and conrod. Pay close
attention during the initial break-in period; this process is
very important to achieve the best engine performance,
reliability, and lifespan.
The proper way to break in this nitro engine is to “heat
cycle“ the engine with short periods of running followed
by cooling down periods. Heat cycling allows the engine
to heat up to its optimum operating temperature,
allowing the components to “wear in” to each other
properly. During the running time, the engines should
be run only SLIGHTLY rich; overly-rich mixtures and cold
temperature break-in will lead to premature wear and
failure of the piston & sleeve and other engine components.
After installing the engine in the HUDY Engine Break-In
Bench and performing the break-in preparation, then break
in the engine by performing the following steps:
1. Keep the carburetor factory settings; do not adjust.
2. Start the engine and allow it to reach operating
temperature.
