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    Disconnecting oil pump

    My father has a 1995 40HP Merc with oil injection. He would rather just mix the oil manually. What does he need to do in order to disconnect the oil pump?
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    Who make the computer for Merc. 4-strokes?

    I've got a 2001 Merc. 90HP 4stroke. The computer went out a while back and I'm trying to decide whom to blame, Mercury or Yamaha? I was thinking of repowering with a Yamaha because of the problems I've had with the Merc, but I don't think I will if most of the problems can be contributed to...
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    Hole in exhaust manifold

    I've got a 2001 90hp Merc. 4-stroke with a nickel sized hole in the adaptor plate or exhaust plate that connects the yamaha powerhead to the drive shaft houseing. The exhaust quickly fills the engine compartment and snuffs the engine. I've tried a jb weld patch but it doesn't hold. Mercury...
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    Direct Voltage Adapter & other merc electrical testing equipment

    What does it do and why is it $65 and can I get by with something else (maybe from an electrical supply or take direct readings and convert)? Also, is there a cheaper way to test electrical components than purchasing wireing harness testers for each componenet at $30 + each - can I make my own...
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    Merc 90 hp 4 stroke - rough idle no power

    My 2001 90 hp 4 stroke will rough idle after start up. It seems that sometimes I would start the motor and I was missing on a cylinder, very rough with no power. Sometimes it would take just a couple of minutes and then instantaneously the problem dissapeared, like a switch was thrown or...
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