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Engine combustion troubleshooting concepts

Matronics Email Lists Forum Index -> LycomingEngines-List

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recapen(at)earthlink.net
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Posted: Mon Dec 03, 2012 2:34 pm Post subject: Engine combustion troubleshooting concepts

Re-breaking in my engine after prop-strike by hangar door induced by tornado.



Considering the engine already had 160+ hours on it - I know how it was running for a while.



I have one cylinder running not like the others.  Before I tell what is happening, I want to make sure I understand/remember the basic concepts.



EGT-only elevated - CHT reduced...unburned fuel going out exhaust and burning on the way out - plug not firing

EGT-only elevated - ...unburned fuel going out exhaust and burning on the way out - plug not firing completely

CHT-only elevated...not enough cooling air

EGT and CHT elevated...lean mixture - air leak



Refresh my memory here.

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