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  1. M

    Fluid leak from prop shaft

    96 40hp Mercury. I noticed fluid (Im assuming lower unit fluid) slowly leaking from prop shaft today. Just had boat out yesterday, had problem with high idle randomly, but ran fine when got home on the muffs. Noticed the fluid in the driveway today. Any ideas? Where do I begin? Replaced...
  2. M

    1996 40 hp merc intermittent high idle

    I have a 1996 Mercury 40hp 4 cylinder. Have owned for nearly 6 months and has ran great. Put new throttle cable on 2 months ago, everything has been fine. Last time I was out, after about 3 hours it started idling high by itself, out of the blue. Stopped shortly after and seemed fine...
  3. M

    40hp mercury water and trim pump

    I just purchased a boat with a 1996 mercury 40ELO serial # 0G313395. Want to replace water pump-should I replace impeller too, or its all one unit? Pretty mechanically inclined, but boats are new to me. Aslo trim motor doesnty work-I hear clicking in motor when buttons are pushed but nothing...
  4. M

    40 hp merc hot water and compression

    I am looking at purchasing a boat with a 1996 40hp Mercury outboard. Did a compression test and got 110, 115, 116, and 119 on each cylinder. Is this about right, or should I be concerned? Also, the water come out was extremly hot, steaming a little. We ran it with a small cheap pair of ear...
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