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Here's
the probable reasons for a poor idle in an aero engine.
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Poor
pressure to tank
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problem may be a modified exhaust system. Too much back pressure
will cause an engine to overheat and the running changes. |
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Too little
back pressure can cause the pressure to the tanks to be erratic.
This will cause variation's in running as the pressure changes
in the tank.
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Use of
crankcase pressure will cause high and low pressure. A restrictor
must be used for crankcase pressurized tank.
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USE
OF WRONG HEAT RANGE GLOW PLUG
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Too cold
of a glow plug will cause the engine to stop as the plug goes
out. An idle bar plug like the K&B
4520 should be used in older loop
scavenged engines.
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RICH
or LEAN IDLE SETTING.
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DEBRIS
IN THE CARBURETOR
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| Be sure the carb
is clean inside. A little piece of dirt will plug and unplug
a fuel orifice thus causing erratic running. |
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