I can dig up written info on the governor and timing, and will be glad to repro it and send. Don't get good results scanning, so would use snail mail. You probably know there were 2 governors used, and their adjustments are different. The original governor was not "variable," which means that it doesn't do much governing if you throttle back. Sometime toward the end of production--1937, I think--IHC went over to a "variable" governor, which governs throughout much of the speed range of the engine. This is the governor with the notched rod left of the gas tank. There were several companies that produced aftermarket variable governors, too, but their control rods or levers look somewhat different. IHC also made a kit to replace the original governor, but its control rod was on the right (I used to own one of these). Most of the F-20s I have seen in recent years have had the original (kerosene) manifold replaced, after the original burned through. You can spot the difference immediately. The kerosene manifold has an enormous heating area around the middle, to keep the fuel hot for good vaporization. A gasoline retrofit manifold does not have this big heating area, AND there is no lever to switch from hot to cold. The original manifold had a lever that you used to switch to "cold" for running gasoline.
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Today's Featured Article - The Fordson F Ignition System - by Anthony West. A fellow restorer contacted me earlier this year asking for some help and advice on a model F that he was restoring. He had over a period of months spent a fair amount of his hard earned cash on replacement parts for the old "trembler" ignition. Sadly though all his efforts seemed to be a waste of time and money as he still couldn''t get the temperamental old thing to run correctly!! If i said that this was a little frustrating for him that would be "conservative" in fact the problem had reduce
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