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In Reply to: 425 lawn tractor posted by bob demario on Sunday, March 07, 2010:
I am working on a JD 245 right now and has a impulse type fuel pump mounted on the left side of engine viewed if you are sitting in the seat. The pump runs off of the pressure variation of the piston moving in the crankcase to move the diaphram in the pump. Sounds like the diaphram could be stuck or it picked up some crud from fuel system and bridged one of the rubber reeds in the pump. You can dis-assemble pump and clean, or purchase a new one and bolt it on. The first check to see if it is the pump or not is to disconnect gas line from carburetor and crank engine to see if it spurts out fuel or not. If it does not, then could be the pump, or not having fuel shutoff valve open or plugged in fuel line or tank. If you can blow air back into the gas tank from the line first going into the fuel pump then you should have a clear enough line to let fuel through to the pump. Then it would definitely be the fuel pump malfunctioning.
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