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48 b don't want to run

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R.Hawk

06-14-2003 11:12:33




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My 48 B will run for about a minute,then shuts off.Fires right back up then shuts off again.I've changed spark plugs and checked fuel filter and took carb off and cleaned it.Did see small fire at intake manifold.What gives?Thanks in advance.




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dave of southwest michiga

06-14-2003 19:17:39




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 Re: 48 b don't want to run in reply to R.Hawk, 06-14-2003 11:12:33  
Just a couple of thoughts. Starting up and running for a minute almost sounds like it's starving for fuel. (especially with an "indication of a fire" at the intake manifold. Sounds like it's a really lean mixture with an intake gasket leaking. Check the gasket and manifold for leaks. Might also check the float level too. Any help if you pull out the choke? Also....when was the last time you checked the fuel tank for water? If it sets outside, or if it's been really low on gas, condensation may have built up in the tank enough to have water in the tank, or if it's "old gas" that may also be a problem.
And I know you said you checked the filter, but have you checked to see that there is no blockage in the line from either the tank to the sediment bowl or from the bowl to the carb?
Hope this give you some ideas. Will see what other's have to say.

Dave of southwest michigan

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steve

06-14-2003 19:15:45




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 Re: 48 b don't want to run in reply to R.Hawk, 06-14-2003 11:12:33  
you are running out of gas. drain the tank , clean out all crud, remove the sediment bowl and screw mount, clean the screen, blow out the line, clean the bowl of carb. you will find something somewhere. fire at the manifold is a problem? is it coming out the port, or thru the gasket. if gasket is bad, you will have running problems also.



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