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RC NITRO ENGINE
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Nitro engines use glow plug igniter connected to the battery supply
for starting up. The batteries supply the power to glow the plug. Once
the required ignition is provided the glow plug shall continue to glow
even though the batteries are disconnected.
If you need the nitro engine to tune-in properly it is always good to
know that heat of the glow plug can alter the combustion timing. If
this heat is not properly set the engine may never be fine tuned. Further,
glow plug can burn out prematurely if you over heat them. They have
an unpredictable life span. It is always safer to use the brand of the
manufacturer that has specified guidelines or a manual for use. This
way you can have a glow plug with longer life span whose usage pattern
is described and you have ready help to refer to.
If your engine runs fine but quits later once it is unhooked from the
power plug this means that its time to replace the Glow plug. But on
the other hand if the engines revs down after you remove the power then
the glow plug is fine, the engine needs wither more nitro fuel or a
hotter plug. The small science behind the whole game is that hotter
plug will typically advance the ignition point while colder plug would
retard the same.
Glow plug needs to be taken care of while buying for your RC model.
Keeping an Eye on your glow plug will help you to understand how you
should adjust your carburetion. Take the glow plug out and look at the
coil element and if the spiral is a little bit pressed and bent it means
that the engine has too much compression. If you are racing on a sea
level track, with 25% or more nitro this could be the main reason. Then
you need to check under head shims and insert a tenth. If the coil element
has a dull, as if it were sanded, it means that the carburetion is too
lean (lack of fuel) and you can damage the engine. You run the risk
to break the coil element and make it fall down on the top end of the
piston, damaging the piston/sleeve. In this case, you should replace
the old Plug with a new plug and richen the High Speed needle 1/8th.
If the thread has a dark color and the plug seems wet, the carburetion
is too rich and the engine isn't running at optimal power. You have
to lean the carburetion closing the High speed needle. When the coil
element is polished and the spiral does not present any imperfections,
your engine carburetion is most likely spot on.
Manufacturers models always come with help or features described for
their glow plug which comes in handy while tuning the engine. Like EZ-Start
Electric Starter comes lights the glow plug and ignites the engine.
The built-in diagnostics for the same tell you if the glow plug is band
and protects the starter motor if there is a problem. Similarly, 55005
1/8 Scale Lightning Stadium Pro (RTR) comes with a glow starter and
a plug wrench but you shall need 7.2V battery for the jump starter.
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