Re: All fuel or not?

Posted by Gene Davis (Ga.) on January 06, 2006 at 19:18:50 from (69.19.14.19):

In Reply to: All fuel or not? posted by Rich in nys on January 06, 2006 at 18:43:10:

Yes they did make "A" John Deeres that were special order from the factory set up for gasoline only.. We sold a few of them in the 50's here in Tennille Ga. at Boyd Tractor Co. which my father was part of. Sounds like you have a gasoline burner with an all fuel manifold. The gas only tractor did have a red cap on the tank, and the filler cap was a ittle ways from the steering wheel end of the hood because there was no starting tank. The gas shut off was under the tank at the glass bowl. The manifold for a gas burner will have a skinny neck for both the inlet and exhaust sides so that it would not preheat the incoming gas charge like the fuel. The old distillate,(John Deere referred to the fuel as this) tractor needed to keep the incoming charge hot to vaporize it and make it burn better. Preheating the gasoline will make it run worse and have less power. The pistons on all the gas burners we saw had 4 compression rings and 1 oil ring and the fuel burners had only 3 compression rings and 1 oil ring. The compression ratio was higher for the gas burner tractor engine and think the timing was slightly advance. Has been number of years since then and memory gets a little stale! I remember that when you listened to a gas burner pulling a load and it was tuned well, there was a clear ringing tone to the exhaust while the fuel burner would sound like it was slobbering. The factory gas burner was also rated at several more horsepower. The difference most of the time came cfrom the farmer paying 10 cents for a gallon of distillate and 15 cents for a gallon of gas, but at the same time he he had a little more power but the farm hands couldn't burn the tractor fuel in their personal cars like the gasoline.

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