Author Topic: McCulloch oil pump problem  (Read 8000 times)

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Offline brokenbudget

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Re: McCulloch oil pump problem
« on: April 07, 2013, 02:49:56 pm »
take the pump off and soak it in some kerosene for a few days. the check valves are gummed up. and you can't take them out for service.
another thing to try is in a container big enough, submerse the pump housing with the piston/spring instaled and tap the piston in/out very fast and firm. unscrew the limiting screw to add some more stroke to the piston. gawd sounds dirtay :D
you'll notice when the little check valves come loose. lift it out of the kerosene (or diesel) and give the piston a few pumps. you should see the level in the intake port go down. and the output port go up. keep doing this for a while, then switch over to a light oil. should clear the oiler out so it works again.
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