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    97 40 merc can't figure this one out

    I have a 40 merc 4 cyl that is running poorly on aceleration and top end. I did the normal checks and then sum. 135 compression on all 4 clean blue spark on spark tester 1/2 gap replaced entire fule system tank hoses ball rebuilt the carbs set the float level all new hoses on the motor...
  2. B

    1997 40 hp merc this is a good one

    I have a 40 merc 4 cyl that is running poorly on aceleration and top end. I did the normal checks and then sum. 135 compression on all 4 clean blue spark on spark tester 1/2 gap replaced entire fule system tank hoses ball rebuilt the carbs set the float level all new hoses on the motor...
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