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    1971 merc 500 50 hp shifting problem

    Please help. I replaced the impeller last summer and did not run my boat but am finding out now that all seems good except when I shift into reverse it goes into gear but as I increase throttle it grinds like reverse is not fully engaged. I have adjusted the linkage and that doesn't help the...
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    please help with volvo aq 125 b

    this is my kids boat it just has minor running problems at this time.i am trying to make sure the firing order and timing are right but i am not a master at mechanics so i need help.should the number one piston be at the front of the motor or the back.i see the firing order as 1,3,4,2 i...
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    compression test

    on a 71 50 hp merc i have checked the compression and on 3 of the cyl it is 120 and on the 4th it is 110.the manual says a difference of up to 15 lbs is ok.my question is this,is 110 to 120 lbs considered good compression??
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    help with timing

    on a 71 50 horse merc how do i connect a tach and timing light to check the timing.is this difficult to do????
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    need advice on 50 horse merc

    hello i am new to this site.it looks like there is a lot of knowledge with you guys so i think i am going to love it here.this is a 71 yr mod series 400 motor.it has the coil with distributor.the motor ran great for years and all at once just would not open up.it cranks right up and runs good on...
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