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Engine backfire during start?

Asked by: 3488 views Aircraft Systems

What causes an engine to make a popping sound right as when the engine starts? It doesn't sound very good for the engine.

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1 Answers



  1. John D Collins on Sep 11, 2015

    Most likely over priming. The excess fuel can be pumped into the exhaust system and when the engine fires, the excess fuel is burned/exploded. It can damage the muffler system and possibly the integrity of the heat exchanger used for cabin heat. This can introduce CO to the cabin.

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