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Recent content by bheck

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    1997 Merc 4 stroke 9.9 hp compression

    I have a 1997 Merc 9.9 HP 4 stroke with about 25 hours on it and was told the rings had frozen in from lack of use, I'm not a mechanic but I took it to a guy who works on motors and we did a compression test with the carb off. Did it twice and both times I had 153 PSI in both cylinders, we then...
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