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#1
09-30-2013, 07:50 PM
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149 misses
I have a 149 that has been sitting for a year or so waiting for me to regain my interest in getting it running.
Here is what happens...It starts right up, idles fine, increase the speed a little and everything is still fine. Ease the lever forward and start around the yard and put a little pull on it and it starts to miss just like an engine out of time. I mean miss bad and shakes too. If I stop and reach down and readjust the high speed mixture setting on top the carb I can get it to smooth right out. Then everything is fine until the load changes again. If I run it slow and just make orbits around the yard it is fine. I even hauled a big load of wood today at just above idle and all is well. I took the carb off this morning, soaked it about an hour blew it all out and put it back together, same result. Changed the fuel filter, blew the fuel line out, new spark plug, but still the miss under load when the governor calls for more fuel. I think it has to do with the mixture that you set on top of the carb next to the throttle shaft. Adjusting that always smooths it out. I have put enough air through it from both ends to have blown most anything into the next county. And yes those four little holes in that adjustment valve are clear. What I think happens when the governor calls for more fuel the engine is going lean, thus the missing, shaking and occasional backfire. So, a carb kit looks like it only have the float cutoff and some gaskets. I'm about to the point of just getting a different carb. So, give me some ideas. Thanks for the help. Dave in SW Missouri 
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