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Old 02-21-2010, 10:59 AM
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ol'George ol'George is offline
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I will try to help here, but it is a general answer that would apply to most any engine.
If you have the points set about .020 with a feeler gauge @ top dead center it should be close enough to run properly.
If it is missing/backfiring at higher speed it is possible it is lean on the mixture.
You might try going richer say 1/4 turn and see what it does.
Usually, counter clockwise turn is richer.( make a note where it is now) so you can return to that setting if no improvement.
It can be a lot of things, but this would be a simple starting place.
sometimes a little thing like a bad plug or wire other times it can be more complex. let us know what you find.
I believe that John Deere used this engine or simular, and a little reading over on their site might give some help is no one here has an answer for you.
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