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 - New Life for an Old Allis - by Tyler Woods. My friend Jon, has an old '39 Allis Chalmers B. He thought it a marginal tractor that had long since served its time. She smoked terribly and never had much power but he couldn't afford another so he was limping along with what he had. Jon's Allis has a small front loader and though it doesn't carry much, it serves his needs. It was the hard starting and low power that made him think it was time to replace the old girl. Jon called me to help him discover why his tractor wouldn't start
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