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 - A Cautionary Tale - by Ian Minshull. In the early 1950s my father bought an Allis Chalmers B and I used it for all the row crop work with the mangolds and potatoes, rolling and the haymaking on our farm. The farm and the Allis were sold and I have spent a lifetime working on farms throughout the country. I promised myself that one day I would own an Allis. That time event
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