Re: 1956 Johnson 10hp bogging under throttle

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September 11, 2016 at 12:26 am #43758
gabriel
Participant

    Well I took off the prop and found a few metal shavings so I think it was spun. I put a different prop on and checked it was running on both cylinders.

    Went for a test run, there was no whine and it went up to WOT smoothly, pushing the boat pretty good. However, when I would lower the throttle from full to 3/4-1/2 it sputters out and dies. Then it takes 15ish pulls to start again.

    What I don’t understand is before I took the motor up to high speeds it would start very easily. This was all on factory carb settings.

    Thinking I should probably get a carb kit and float.