Thread: 1989 marathon
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Old 06-11-2019, 06:01 AM   #2
LukeL
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Default Re: 1989 marathon

You are the gas expert, not me, so explain this to me if needed, but I thought the crank seals were in place to cause vacuum in the crankcase under the piston to make vacuum for the fuel pump... if that’s the case, they shouldn’t affect vacuum for the carb, as that’s above the cylinder?

I know with both of the 3PGs I had changing the crankshaft seals didn’t affect compression or carb suction.
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