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Tractor Talk Discussion Forum

john deere 2-cyl pony engine

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a.belk

07-26-2005 19:22:15




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MY R PONY GRADUALY BECAME HARDER TO START AND FINALY WOULD NOT START. CRANKING OVER IT ONLY BACK-FIRES THRU THE CARB.. I CHECKED THE PLUGS AND THE MAG. FOR FIRE AND SETTINGS, OK. CHECKED THE CARB AND FUEL SYSTEM,OK. PULLED THE VALVES OUT AND RE-LAPPED FACE&SEAT & SET CLEARANCE .010 SAME RESULTS. PULLED THE MAG AND CHECKED THE SETTING OF IMP.PLATE, IT IS STREIGHT UP ,12.5 DEG.. BEFORE I PUT THE MAG. IN IS THERE ANYTHING I AM MISSING?

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Weirsdale George

07-27-2005 05:44:56




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 Re: john deere 2-cyl pony engine in reply to a.belk, 07-26-2005 19:22:15  
Check to make sure that a dirt dauber hasn't built a nest in your air cleaner intake. I had this happen and now have the intake covered with a piece of screening.



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big jt

07-26-2005 22:17:37




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 Re: john deere 2-cyl pony engine in reply to a.belk, 07-26-2005 19:22:15  
Easy thing to replace would be the condenser. Check your points if you haven't already. A bad condenser or coil can cause a mag to do real funny things.

Another possibility what is the condition of the air valve in the carburator. If the leather is worn out and not seating it would cause the mixture to run lean and give the symptoms you describe. BTW the air valve is the leather piece that closes the intake, it is spring loaded and automatically opens against the spring to make the mixture.

HTH

jt

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