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  1. J

    15 hp Mariner

    Which plugs and what gap should I use in a 15 horse 1990 Mariner? Unable to locate a specific manual. Unknown history on the motor. Compression is 125 and 130 and motor seems to run strong, but smokes a bit when trolling.
  2. J

    Throttle won't twist. '90 Mariner 15 hp

    1990 manual start 15 hp. New to me, unknown history. Tried to twist and has a lot of resistance. Removed the cover at the 90 degree elbow and the cables are free, and free to move where they terminate on the double sheave pulley(?) on the side of the carb. The sheaves just don't want to...
  3. J

    What year is my Mariner?

    New to me, 15 Mariner - OC 131054. Just purchased it from a reseller. No known history, what all should I check before using. It is still well below freezing here in Maine, and my garage is unheated so I am thinking of waiting till spring to start it up. Is there a model specific repair manual...
  4. J

    J3RETB Need help

    I think this motor was made in Belgium, But can't find any infoon repair manuals / impellers for it. Any help woulld be appreciated. TY
  5. J

    93 Johnson 3hp impeller replacement

    Trying to replace impeller as the motor runs hot. The old impeller looks shot, hard and has quite a set to the fins. Everything is apart except I can't figure out how to get the drive shaft to release from the motor. does it go straight through the motor to the flywheel nut? Any how I can't...
  6. J

    3 HP Johnson year?

    Howdy, I had a Johnson 3 hp given to me as part of another deal. Model J3RETB.......# B 08997667 It started fairly easily with new gas. (It had been drained) But does not idle real smooth. And occasionaly dies. Do you think that it needs carb work? I polished the flywheel contacts while...
  7. J

    78 Johnson 15 hp water pump

    First thanks to all who contribute to this site My motor has questionable water flow. So following the water pump/impeller replacement directions I found the impeller "key" is a piece of 1/16" round stock that rides on a flat in the shaft. Shouldn't the key have a flat machined in it? My next...
  8. J

    78 Johnson 15 hp plugs

    Hello, Nice informative website. My 1978 Johnson 15 HP needs new plugs. Model 15EL78B The pugs in it are QL77JC4, but the tag on the plug wire says L78V. Which is right, and what would the gap be? Thanks, Another Newbee
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