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  • Carb issues

    1976 johnson 85
    I'm havering an issue that may be a problem. First let me say there carbs are clean, I took the off, took them apart batted them blew them out put new gaskets in and set float levels. The thing I noticed is these are 1 5/16 carbs. I don't think these are stack for this motor, the problem is it seems to be loading up at idle, there is no fuel mix screw. I did a couple of basic checks, compression at 142 on 2 3 4 and 140 on 1. No leaks at the power head. Did just think of something thought the plugs in it are the same plugs that were in it when stored, probably ought to change those. They are ngk br9hs-10. Should I put champions in? Plugs really freak out some people with outboards. I have heard that you can swap out the carbs intakes and exhaust baffles with the 115 because the bore and stroke are the same. Looks like only the carbs are the only thing swapped. Ant ideas?

  • #2
    If the carbs are not original carbs then may have wrong size jets in them. NGK plugs are ok, I use them.
    Regards
    Boats.net
    Evinrude Outboard Parts

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    • #3
      NOG PLUGS ha ha ha
      chuck them straight in the bin.
      champion is the plug for this engine, ngk DO NOT do a correct replacement for the champion plug you need.
      Ngk will often work but the ignition system was meant for champion so get the correct ones.
      check the part numbers on the carbs against the correct carbs for the engine.
      sounds like you have a spark problem.
      the spark needs to jump a minimum of 7/16ths or the engine will not run right.

      like said above could be its jetted wrong for you altitude !!!!


      phill

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