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  1. #1

    Default help identifying

    i need help figuring out what year and model this engine is, was told it is a 1990 johnson 90hp. id plate is missing only numbers I could find are on the freeze plug. as follows thanks


  2. #2

    Default Re: help identifying

    also I have an issue it seems like the bottom two cylinders aren't firing. the plugs look to be clean and wet when I pull the plug wires from the bottom two cylinders while engine is running I can hear the coils arching off something then as soon as the plug wire is put back on the acring sound stops

  3. #3
    Join Date
    Sep 2010

    Default Re: help identifying

    CD makes this an 86 commercial 100 hp model.--------------Compression test will tell the story.----Likely a problem will quickly be found there.

  4. #4
    Join Date
    Dec 2015
    maplevalley WA

    Default Re: help identifying

    Run it at nite and look for the fireworks?
    It takes a nickle to go first class!
    If it aint broke dont fix it!!

  5. #5

    Default Re: help identifying

    ran a compression test this eaving all 4 cylinders are at 90 psi seems low to me but odd that they are all at 90 together ?

  6. #6
    Join Date
    Apr 2016
    barnegat NJ

    Default Re: help identifying

    Also x=extra long shaft, wt=electric commercial tilt+trim, Fire it up in the dark as kim posted
    Last edited by johnnygjr; 05-17-2017 at 10:12 PM.

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