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Old 22nd March 2005 | 15:31
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FlyingForFun

Why do it if it's not fun?
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Joined: Jul 2001
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From: Bournemouth
Engine starting - fuel injection

Purely to satisfy my own curiosity:

When starting a fuel-injected engine, the usual procedure (obviously it may vary from one aircraft to another and you should check your POH) is to start with the mixture at ICO, and advance it to full-rich once the engine fires.

What is actually going on here? Fair enough for a cold engine which has been primed - presumably the priming fuel will ignite and cause the engine to fire. But how about a warm engine which hasn't been primed? How does the engine fire if it has no fuel? Or is there some gadget in the fuel injection unit which means that full-lean actually allows a bit of fuel through if you're trying to start the engine?

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