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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Bobcat fuel pump

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06-01-2004 12:57:19

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I have a Bobcat 643B (gas) which suddenly quit. I am thinking that it is the fuel pump. I am not getting fuel to the carburetor. I can blow into the fuel line and get pressure in the tank, so it seems that the fuel line must be clear.

How to check the fuel pump? Any other thoughts on this problem?

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06-01-2004 15:36:14

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 Re: Bobcat fuel pump in reply to lastcamp, 06-01-2004 12:57:19  
What brand of engine? If it's a Wisconsin, remove the screw and the top of the fuel pump, and crank the engine over. If fuel doesn't pump up to the top of the resevoir, then the pump needs to be rebuilt.

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06-01-2004 18:10:13

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 Re: Re: Bobcat fuel pump in reply to Dale(MO), 06-01-2004 15:36:14  
I think it is a Mitsubishi engine, an inline four.

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06-01-2004 20:07:42

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 Re: Re: Re: Bobcat fuel pump in reply to lastcamp, 06-01-2004 18:10:13  
Pull the hose at the carb. Put it into a bottle and crank the engine. No fuel, then its the pump. On my 722, which has a Ford inline 4cyl. I just replaced the pump with a cheap electric, available at any auto parts house. I blocked the pump hole with a plate I fabricated. It runs fine.

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