Posted by Dan Bear Kelley on August 29, 2008 at 06:35:34 from (206.53.20.149):
Help time! I got my M back together yesterday. New plate on the water jacket. Rebuilt the carb. Hit the starter and filled the barn with blackish smoke. Not oil-burning smoke. Way too rich carb black smoke. Closed the idle screw all the way, and she kept running. Closed down the power screw most of the way and she kept running. I finally had to shut her down and get some fresh air. After she aired out, I tried again, and she was mostly flooded.
I was VERY careful in the carb rebuild. New needle and seat. Correct gaskets. Clean clean clean. Double checked the float height three times. Possibly an air bleed is blocked? or the float has sunk?
I have a couple options. I can rebuild again, this time replacing the float. OR I can get a rebuilt carb.
I am leaning toward getting a rebuilt carb, as it is obvious that this one has been rebuilt a few times. I could be trying to fix unknown problems caused by someone else's inventiveness.
The problem is that there was no tag on this carb. So, I do not know what model it is. There are (at least) two carbs for the M. My M was built in 1951, if that is any help. So, if there was an early model carb and a later model carb, mine is more likely the later model. Can anyone point me in the right direction of which carb to get?
One final thing. There is a persistent gas leak out the bottom of the carb where there appears to be a round plug of some kind. This is not the drain, which is a small square-headed pipe plug. This is dead middle of the bottom. Anyone have any ideas on stopping this leak?
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