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JD 70 Fuel

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CTex

12-06-2002 17:35:01




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I just rebuilt a 70. Shaved the head, high top pistons, new manifold, Even shaved the eyebrow off of the intake valves. It is plenty stout now, however when I am pulling for 100 feet it runs out of fuel. I have drilled out the jets a little
but even then I still run out of fuel. I have checked most of the obvious, fuel lines, and other items are clean. It will pump black smoke at an idle but pulling hard it acts like it starves out of fuel. What's up?

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Clooney

12-06-2002 17:50:05




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 Re: JD 70 Fuel in reply to CTex, 12-06-2002 17:35:01  
CTex, you probably have a fuel restriction somewhere. Pull the drain plug from the bottom of the carb & hold the knurled knob in on the fuel shut-off [if it has an auto shut-off] & see if you get a pencil sized stream of fuel for at least 30 seconds [if you don't, you have a restriction somewhere]. Start at the tank & open up the system & do a flow test until you find the restriction point. There is strainer in the fuel inlet at the carb that could be plugged or plugging. ~You might want to check the float level, & the bowl vent for being plugged.
~If nothing found there look for an ignition problem or weak coil...

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brian

12-06-2002 17:41:18




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 Re: JD 70 Fuel in reply to CTex, 12-06-2002 17:35:01  
check the bowl maby its shaking shut?????



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