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Tractor Talk Discussion Forum

john deere model m 1950

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loye wilson

08-04-2003 11:26:13




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I have a johnny 2 popper that does not run. I have changed all of the following. New spark plugs, gapped correct. new points and condensor corectly gauges and installed. new fuel, sediment bowl, and filter. carbeurator cleaned, float checked, new gaskets. new battery, installed correctly, with a pos ground. I am getting fire to the plugs, but all i get is an occasional backfire. the only thing i have not done is go into the top of the engine, ie checking for bent pushrods, bad valves etc. anyoney with feed back is appreciated.

thanks

labloye@yahoo.com

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Pete - IN

08-05-2003 01:41:16




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 Re: john deere model m 1950 in reply to loye wilson, 08-04-2003 11:26:13  
Probably should not tell on myself since it was so dumb. Once after working on the distributor, I accidently reversed the sparkplug wires going into the distributor on a JD Model A. Boy did it backfire. You may have done the same thing.



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Duke(WNY)

08-04-2003 15:43:10




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 Re: john deere model m 1950 in reply to loye wilson, 08-04-2003 11:26:13  
"occasional backfire" Have you checked the timing?
Also check for side play of the distributer shaft - if it wobbles back and forth your point gap will change.



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Russ

08-04-2003 11:40:36




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 Re: john deere model m 1950 in reply to loye wilson, 08-04-2003 11:26:13  
It is pretty common for valves to stick if any water gets in the exaust. Check compresion and if is bad then pull valve cover and check for stuck valves.



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