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    1998 75 hp Mercury

    While running on plane for about 4 minutes the engine starts skipping and spuddering. When I pull it back to idle it idles fine. Then it will jump right up on plane again and take off for another 4 minutes. I'm at a loss. Idles fine, cranks fine runs full blast and just starts skipping. I...
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    Mercury 200 20 hp exhaust spray?

    Re: Mercury 200 20 hp exhaust spray? I just separated my mid section from the powerhead and when I got the new powerhead gasket noticed that the area you are referring too is closed off from the powerhead. In fact the exhaust is through hub exhaust and that is why you do not see any spray. I...
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    Mercury 20 HP Phase maker ignition 1972

    Interestingly, I am having a weird problem finding the spark in my 1972 20 HP Mercury. I pulled the external coils tested them and they are okay. I put them on one at a time and tested them individually as I put them back on the engine. Each one of them tested great and I had good spark at the...
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    20 HP 1972 Mercury Swivel Pin Seized

    Re: 20 HP 1972 Mercury Swivel Pin Seized Here are the pics as promised. What you are looking at is the mid section right under the tiller handle. The rusty swivel pin is with the slot and hole in it is the pin.
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    20 HP 1972 Mercury Swivel Pin Seized

    Heated can't describe the frustration I am going through trying to get the swivel pin out of this frozen section of motor. I have heated, PB Blasted, greased, beat, and pulled on the pin to try and get it out. Is there something I am missing? This is what I know and I can't find any...
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    Compression ratio for 1964 3HP Lightwin

    I had problems getting my 3 HP started so I checked the compression and did not like what I found. Does anyone know what the compression of my motor should be?
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    Spark? weak but still present

    Frustration has set in on this 20 HP Merc. Tested the spark today and looks really weak but it still there. Where is the spark that looks like a taser going off? Does anyone know how much spark is good enough or how to improve the spark or better yet what causes weak spark? Its a 1972 20 HP...
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    Lower Unit Frozen can't remove, help!

    I have read most of the post about trying to remove the lower unit from my newly acquired 1972 Merc 20hp. Finally got it to crank and prayed that it would pump water (not). Now the challenge to remove the lower is haunting me. Put a 2x4 on the cavitation plate and hit that with a hammer, not...
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    1972 20 HP ignition nightmare

    I know you guys have addressed the issue with this ignition system before and I read most of the post. I was looking for a step by step way to check each component of the ignition system. Is there such a thing? What kind of tester checks the condenser these days? I do not understand how to...
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