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Carb Air Leak

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I mentioned before that my Onan BF has an air leak around the throttle shaft. My plan is to replace the O-ring packing (forgot to install it during an earlier rebuild) with hopes that it will stop the leak. Somehow it just doesn't seem that it will do the trick. I'll eventually find out but was wondering what you guys think. What's next if the packing doesn't work?

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firefoxz1
Some hardware stores sell brass bushings. Get one with the right size ID, find out what the OD is and drill into the carb housing (not all the way through), tap in the bushing and as long as the shaft is OK you should be good to go. I have done a lot of briggs vertical engine carb's (one piece ones) and found out that most of the time it is just the shaft that is worn so hopefully this is the same and you can get a new shaft from Onan.

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