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- Dec 6, 2019
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- In the woods in Western Washington
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No it's not fumes in the return line. The vapor line that goes to the charcoal canister is vapor, but the return line off the fuel pump is raw gas. The principle of the system is to keep the gas before the pump moving so it doesn't get a chance to heat up and vapor lock. I do not know the volume of fuel returned in the return line, but I lost a 1/4 tank of fuel in 20 miles, because I had left the return line off the valve one time. I fired it at home and it wasn't until I had to pull up to stop 20 miles later. I smelled the fuel looked at the gauge and knew something wasn't right. Lucky nothing more than some lost fuel occurred.THANKS, I appreciate the offer. I didn’t know that much fuel is returning from the fuel pump. Thought it was 99% fumes.
If I cap off the return ports on the sending units, I also have to cap the pump port? How much pressure does that return have at the pump, the same as it has to the carb?
I can run the lines, mostly steel. I’d appreciate the rundown when I get there. First need to fix my tank or find another one. This one has leaky pits n a small place under a strap. Been watching vids on de-fuming on YouTube. It’s a small spot.