You don't need anything else but that87 octain normal 10% ethanol gas. They will run fine on that. I had a 65, 68 4000 and a 68 5000 and all were good on that. They do NOT vapor lock if fuel system is anything like factory. When my 5000 started acting simular I too it to the local Ford tractor dealer to get fixed, Could find nothing and thought was my imagnation.. Turns out they did not know anything about a gas engine, only diesel. I took carb off and took it to a long time Ford tractor dealer mechanic that Ford decided his dealership was too small they no longer wanted him. He tore carb apart and founf aclerator pump was not working, fact is it was froze into its bore hard enough he could not get it out. Had to send it out to someplace with more tooles than he had to get the piece cut out. When it was finally able to be rebuilt I put it back on and tractor ran just fine with no adjustments needed., So find a good carb repairman and your troubles might just be gone. Have no idea why yours would be overheating. Mine would start to act up after a couple of hours heavy run time.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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