Posted by Dereck Borders on December 02, 2009 at 13:21:54 from (12.22.180.2):
I have a friend who has a 70 lp JD. He asked me to look at it during the Thanksgiving weekend. A couple of weeks ago according to him it backfired a couple of times and then seemed to lose a bit of power. Now the exhaust turns cherry red after just a couple of minutes run time. Tractor starts right up and is not missing but has a different sound to the exhaust. I pulled plug wires off individually while it was running to verify it was not missing. I seem to think lp gas is being burned in the exhaust but have never run across this before and don't really have an idea. We also pulled the valve cover and everything there seems to be working as it is supposed to. Anybody got any thoughts? Any help is appreciated.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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