Posted by WA-Hal on August 15, 2010 at 16:05:09 from (208.81.157.90):
In Reply to: I hate alcohol gas posted by blue_tractor_man on August 14, 2010 at 19:29:21:
You might try wrapping the fuel line with aluminum foil, about 4 or 5 layers thick. That would cost almost nothing and is pretty easy to do. It worked on vapor lock prone cars in the 60's, but I haven't tried it since. Wrapping the muffler with header wrap might help, but I think it would be a much bigger job and you would need to find a source for the material. I also would wonder how durable header wrap would be used on a farm tractor doing various jobs. I think I might try stuffing some fiberglass between the muffler, rocker cover and heat shield to see if it helps. A layer of thin aluminum sheet laying on the muffler might also help reflect some of the heat away from the fuel tank area. That sheet could be held in place by the fiberglass.
Around Eastern Washington, I don't think any of the regular gas stations sell anything but alcohol blends, and for the most part, I guess they work OK for me. I don't like alcohol in my chain saws, so I bought a couple of gallons of low lead avgas for mixing for the saws. Unfortunately it cost close to $6/gallon--kind of expensive for regular use. I hope it was worth it for the chain saws.
Another thought: exhaust temperature is cooler if the mixture is a bit rich and the timing is a little advanced. Retarded timing really heats things up.
If you hear your fuel boiling in the tank, be really careful. Wait to open the cap until things cool down, as there might be pressure in the tank. If the pressure is suddenly released, it might spray gas all over, which could be incredibly dangerous. You also might want to make sure your gas cap vents adequately. Good luck!
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