You might try advancing the timing. Move it up a couple degrees at a time untill it starts to ping. Then back it down. It may take some time to find the sweet spot. Make sure the mechanical advance is working correctly. There are very few gas engines out there that the factory timing spec wasn't conservative. I'd also ditch the points and condenser for an electronic conversion. I have found on 2 small tractors that going from a .025-.030 plug gap with an electronic conversion to .045 made a big difference in starting and idle quality. Check your distributor shaft. If it wobbles, your timing will vary which can affect fuel economy. Just to be sure, you did make sure the aircleaner is not restricted don't have a loose baffle in the muffler restricting the exhaust right?
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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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