Re: Johnson QD12 10HP carburetor problem

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bob-d

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Replies: 513
Topics: 104
#79836

Thanks gents for the suggestions.
Buccaneer, the early QD’s are a little different setup than your picture. I’m going to drop the bowl and check everything again today. All new gaskets, when I did the rebuild. I also put the carb into my Ultrasonic cleaner.
Don, this model has the ignition throttle butterfly setup and it’s synchronized.
Ben, you are right, you can’t set up the carb with that unusual selector switch engaged….found out the hard way.
I’m glad that I’m not the only one who has a problem with the midrange setup for these motors. It almost as the low speed circuit doesn’t want to hand off responsibility to the high speed jet!
It idles great and it runs at full throttle great.its just the middle that rough.
Bob D


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