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monsoon engine compression


wilsonalexander

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Does anyone know what the engine compression numbers should be for the monsoon engine in my 99 response lx? New boat for me and I want to learn about it.

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The Indmar 94-02 manual says min 100 PSI. You are probably looking for a better answer but that is a place to start.

and the lowest PSI should not be less than 70% of the highest cylinder.

Hope this helps.

Edited by lf133
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The Indmar 94-02 manual says min 100 PSI. You are probably looking for a better answer but that is a place to start.

and the lowest PSI should not be less than 70% of the highest cylinder.

Hope this helps.

Ya want them all to be close...Top notch would be about 135 to 140

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