Posted by rustyfarmall on November 14, 2009 at 04:07:06 from (209.152.78.140):
In Reply to: Super H won't start posted by Mark on November 13, 2009 at 19:07:33:
The super H carb uses that double float, just like an M, and it is very easy for the float to get "tweaked" so that it actually rubs the sides of the fuel bowl. If the float cannot move freely inside the fuel bowl, it cannot drop down to allow fuel to get in, and it cannot rise up to shut the fuel off. When you rebuild one of these carbs, you always should hold it up to your ear, turn the carb upside down and then turn it right side up, and listen for the float moving inside. Yes, you CAN hear it.
It is also quite possible that NEW float valve is a bit sticky and just isn't dropping down enough to allow a sufficient flow of fuel. Clean both the needle and the seat with aerosol carb cleaner BEFORE installing. I've also been experimenting lately with spraying a small amount of silicon lubricant on the viton tipped needle before installing. It does seem to help.
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