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    Mercruiser 3.7

    Hey everybody , just got a quick question , I own a 1987 sea Ray Seville it has a mercruiser 3.7 165hp I see that the 3.7 also came with 190hp how can I upgrade my 165 to 190hp ? What exactly is different between the two is it carb size , different cam, comp. Ratio? Hopefully someone out there...
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    1988 force 85 no spark cly#1

    I recently bought a 88 force 85 hp it has no spark on cly#1 I don't know much about boat motors let alone there ignition system . I have been reading a lot on the net and I tested all three coils with an ohm meter and they were all in spec. I also checked the trigger that was also ok , I haven't...
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