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  1. L

    Johnson 40hp? not sure of year maybe 80s or 90s, running badly and needs to run rich to idle and have power

    Hi thanks for the info, ill check all that aswell. Hopefully i havent scored the cylinder. Im from new zealand so ill have to try find parts here but its a bit hard for sure haha
  2. L

    Johnson 40hp? not sure of year maybe 80s or 90s, running badly and needs to run rich to idle and have power

    I just bought the boat and he said it was rebuilt, think i got sold a lemon in terms if the motor, the actual boat is great haha 🫠, ill clean out the carbs today and check the timing, do u know what advance it should have to run good? Thanks
  3. L

    Johnson 40hp? not sure of year maybe 80s or 90s, running badly and needs to run rich to idle and have power

    Hi thanks for reply, old owner painted over the tag or removed it, not sure how to see model number, compression is 125psi both cylinders, im running 50:1 mix with new fuel lines from tank and a hard bulb, not sure how to measure the spark jumping gap?
  4. L

    Johnson 40hp? not sure of year maybe 80s or 90s, running badly and needs to run rich to idle and have power

    runs great for 10 minutes on water and then its stuck at 5kph for the rest of the trip with super low rpms at full throttle in gear, If i clean the spark plugs if works maybe once or twice for about a couple minutes, out of gear i can rev it up to max rpm but for about 1 second when putting full...
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