Air hissing sound when shutting boat engine

[zambonidriver]

Hi everyone I have a 2012 MOJO. When I shut the engine I hear a brief hissing sound where air is rapidly escaping. It's very brief and noticeable with the engine cover up. Everything else seems normal. Any thoughts? Almost sounds like a hose is loose.

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[New Guy]

Shoot a video of it happening.

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[zambonidriver]

Shoot a video of it happening.

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https://goo.gl/photos/wsXYr2GdLVAoNtrr7

Hope that works.

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[New Guy]

I hear it but I've got no idea.

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[icemanftr]

That is just the intake sucking air one compression cycle of motor. They all do it. Think of your engine as a big vacuum shutting down. It will suck air for a brief second.


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[zambonidriver]

Thanks, appreciate the insight. Not a sound I've heard before but I've early had the engine cover up. I'll just close it and resign myself to inlgnirance being bliss :) On with the surf season.....

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