I'm experiencing the same thing and I'm not sure it's vapor lock. The galvanized material inside of my jubilee's tank is flaking off, so I installed a 1/4 in line fuel filter just before the carb. Thought I was experiencing vapor lock, so I installed a heat sheild and no luck. Next, I installed a plastic lawn mower filter that I could see the fuel going through it. After a short time of running, the filter filled with air. Removed the filter from the gas line and fuel came out the gas line. Decided to get a foot of rubber gas line and install the filter vertically, thinking the air would go up to the tank and the filter would fill up with gas. NO LUCK. The air inside the fuel filter would not go up the 1/4 inch steel gas line. It was like it was vapor locked without a source of heat. The only way I could bleed the air from the filter was to remove the hose on the top side of the filter and let the air out and gas in. I'm thinking the problem may be solved by installing a larger diameter fuel line that will allow air to go up the tank. It's like taking a drinking straw and filling it with a liquid and placing you finger over the top of the straw. Air doesn't go up the straw and the liquid won't come out the straw. Try doing that with a larger straw or pipe and air will go up and drain the straw.
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Today's Featured Article - Memories of an IH Super A When I was ? up to 10, I worked on my Papaw's farm in Greeneville, TN every summer. As I grew older (7), it was the thrill of my day to ride or drive on the tractor. My Papaw had a 1954 IH Super A that he bought to replace a Cub. My Papaw raised "baccer" (tobacco) and corn with the Super A, but the fondest memory was of the sawmill. He owned a small sawmill for sawing "baccer" sticks. The Super A was the powerplant. When I was old enough (7 or 8), I would get up early and be dressed to
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