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Re: Re: Re: Red or Gray
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Posted by Bill Smith on July 08, 2001 at 20:42:20 from (128.242.4.59):
In Reply to: Re: Re: Red or Gray posted by brandon h on July 08, 2001 at 17:32:30:
1938 F-20's had the v belt instead of the flat belt which drove the fan. I believe 37's had the flat belt like the 36's. I would deffinately check valve clearance. I have worked on several tractors after other people have and they didn't set the clearance correctly. F-20's where notorious for developing stuck valves. Especially if they sat outside. Make sure that you don't have a valve sticking once in awhile creating a fired piston and a backfire out the exhaust or intake at the same time. And like Glen says check the timing. I assume you know all about the spark advance on the mag and the spark retard. That all has to come into play when you are checking timing. Then if it is set right there is a spark adjustment on the mag and if it is complete their is a lever that does this. If not the cap over the points must be down for normal run and up to kill the engine. I was running a diesal fuel mixture with the gas one time to compensate for not running leaded gas. The carb was a little touchy as well along with the governor set a little off and I had trouble with backfiring but I expect your situation is a little different. I found that adding fuel to gas was not very good becuase the heavier fuel didn't seem to mix and would settle in the carb, sediment bowl, and in the tank when tractor sat making starting a failure. I used the duel tanks to do this for awhile but eventually just went back to straight unleaded gas to make things simpler. But anyway that is where I would start. You might check your carb to see if it is set right. It might be delivering the wrong fuel mixture to engine. Well I have jabbered enough. Hope you get it running right.
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