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JD 50 has Crazy attack

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Ben.So.Tex

07-21-2001 14:10:31




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I was pulling a round bale buggy today moving hay from the field, The tractor ran fine for about 2 hrs and then started to miss and puff some black smoke out the exhaust, I put new plugs in it and that did not help, you can hear it back fire in the intake, could my timing be off alittle are could the float in the carb be sticking? It been awhile since I install points, this 50 has a mag on it,,,, a few time while it was running fine it sound like a intake vavle would stick alittle. The engine was over haul about 2 yrs ago.Pulling a hay buggy and some minor weed shreding is all this tractor dose,,,maybe 10 hrs a year use.

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DP

07-21-2001 22:34:41




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 Re: JD 50 has Crazy attack in reply to Ben.So.Tex, 07-21-2001 14:10:31  
I will have to agree with Clooney on the possible valve problem. First check the point gap, and clean them. Also replace the condenser. The backfiring is a classic example of a weak condenser. Let us know what you find!



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Clooney

07-21-2001 14:27:13




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 Re: JD 50 has Crazy attack in reply to Ben.So.Tex, 07-21-2001 14:10:31  
Ben, while it could be many things including the mag or wires usually when it backfires into the intake manifold it is a burnt intake valve on that cylinder. But the first thing you should check is the carb adjustment (try running with the choke part way on)if OK there test the compression on both cylinders, if it is low on one or both then check the valve lash adjustment. If nothing found there then. Move on to the Mag, points, condencer & coil in that order. A new set of plug wires wouldn't hurt either.

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