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    Old Mercury 3.9 sprays gas out of carburetor cover when priming

    That makes sense. I have disassembled, inspected and cleaned the carburetor components. The needle, float and seat are all in very good condition and it seems to be seating fine. Is it possible that the pressure from the primer bulb from the fuel tank is easily overcoming the needle seating...
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    Old Mercury 3.9 sprays gas out of carburetor cover when priming

    Hi everyone. I google my little heart out but didn't find an answer so I am asking you. I recently got an old Merc 3.9. It runs OK, but when I prime it or just run it in general it sprays gas out of the hole in the carb cover that I have indicated in the attached pictures. I have no idea why...
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    1989 DT4 out of control idle speed

    Beats me. Running too lean? It had no chill. Full screaming RPMs and then nothing where it should be idling. One of the low speed jets was plugged, now that it is cleared up it runs good at all throttle positions (in a bucket at least).
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    1989 DT4 out of control idle speed

    Thanks for the suggestion. Turned out it was a plugged jet that I didn't even know was there. Found it by accident, poked it out, soaked over night, blew it out, runs great now. I really do wish there was a better manual that shows where all the little jets and stuff are in the carb.
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    1989 DT4 out of control idle speed

    I recently picked up a 1989 Suzuki DT4 2 stroke outboard. It starts normally with the choke on, but the second I release the choke the RPMs skyrocket at all throttle positions except for fully closed (or very close to that). I have given it fairly good cleaning short of an ultrasonic cleaner...
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