Reply To: 1967 Evinrude Lightwin won’t start/run

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August 25, 2020 at 9:40 am #212600
joesnuffy
Participant

    That’s good research on your speed marks and yours are closer to the middle than mine are. I just saw your link https://aomci.org/forums/topic/1966-evinrude-lightwin-3-hp-carb-sync/#post-17447 and I think your magneto cam and cam follower on the carb are set very close to where they should be. If your motor is capable of running high speed then your probably good-to-go because I know it will run slow speed.

    I do run NGK B6S spark plugs in mine and they seem to make it run better at lower speeds without fouling they are a tad hotter. I use these spark plugs in a lot of my older outboards that don’t have thermostats because they are a tad hotter and I get better results. https://www.sparkplugs.com/product.aspx?zpid=9235 I had made a mistake on spark plug link but its right now.

    The actual manual says to run it with the low speed screw turned out at 1 1/4 you have yours set to 1 1/2 so your in the ball park on the low speed setting.

    Good Job,
    Joe

    The link I accidentally put for the Champion J6C #823 (https://www.sparkplugs.com/product.aspx?zpid=8593 is the replacement plug for Champion J6J of yesteryear to the best of my knowledge and it can be modified into a champion J6J. I read in an old service manual from the late 40s early 50s that the J6J plug has a shorter top electrode which is filed down close to the center of the center of the bottom center electrode I have modified newer champion J6C and J4C spark plugs like this before when they are what I have because it makes the fire jump from the center electrode at an angle to the top electrode helping to prevent fouling. I am not suggesting you do this but it is interesting.
    In my pic you see the arrow and you would file the top electrode back to the other vertical line I have drawn in pic making the top electrode a bit shorter. Being careful not to file the center electrode whatsoever only the top electrode.

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    • This reply was modified 6 years, 2 months ago by joesnuffy.
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    mierla