Question about Bobcat Miller 225 Welder Generator 907209 Or 907210

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Why won't it run?

I have fuel at the carb bowl but will only run if primed. I drained all old gas and have new fuel in carb so pump must be working right? I have removed carb and took it apart and cleaned it also.

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If the carburetor is ok, check the fuel pump. If it had bad gas in it, the tiny diaphragm gaskets within the fuel pump might be gummed up a little. You can check the pump volume if you remove the fuel line from your carb, aim it into a bucket or other receptical, and watch it pump. The gas should pulse smoothly with a little force. I'm not sure how to describe it, but it should be more than just a trickle, in other works. If your pump seems to be doing ok, and all of your fuel lines are clean and clear, the problem may be an intake manifold gasket leak, a carburetor mount gasket leak, or the intake manifold itself may be leaking. The intake manifold is two-piece, pressed aluminum with a sealant in between the two pieces. A leak at any of the three locations I mentioned would cause the problems you're experiencing. The fuel would of course reach the carb, but due to the any leaks, the vacuum needed would be decreased to the point that it wouldn't be enough to draw the fuel through the carb.

Hope this helps.
TW

Posted on Apr 21, 2015

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