Garbage picked a Poulan mower with a 5HP Briggs Quantum engine to mess around with. Apparently it was filled with E85 (someone experimenting or trying to be cheap). Anyway I dumped the fuel out disassembled and cleaned the carb and it runs but doesn't idle high enough. It is one of the fixed idle speed models, so I looked this thing over with a fine tooth comb and could find no good reason it won't idle to speed properly. If I shorten the spring by holding it it idles to speed fine. I compared it to a couple of others here and can't figure out why the darn thing idles low as everything looks as it should. It appears to otherwise run fine it does not appear to be running rich or lean and it starts and runs fine just like running at mid throttle. Only parts source I have is on a John Deere and it is an auto choking version as opposed to the primer setup, and the spring seems to be a different length. I could swap the whole carb assembly but it would be a lot of work.
Not sure what my options are here, only thing I can possibly think of is they replaced the spring and it is the improper part. If I want to be cheap about it I can manually shorten the spring to compensate, it isn't like it matters it came from the garbage. Anyone got any other ideas?
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Not sure what my options are here, only thing I can possibly think of is they replaced the spring and it is the improper part. If I want to be cheap about it I can manually shorten the spring to compensate, it isn't like it matters it came from the garbage. Anyone got any other ideas?
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