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I have Poulan 42cc. 18 in.,no chain break it is older model.Where does the carb.get it signal to run pump diaphram. Under the intake port, or from lower crank case. The carb.is not drilled for intake port to be used

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There is only two ways the impulse from the piston riseing and falling can get to the carb, either through a drilling in the intake side of the carb, or a pipe directly to the top of the pump cover on the carb, the pulse from the engine can come from many places, the crankcase, the transfer port, the cylinder intake port.

Posted on Mar 18, 2011

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check your tank breather is working,

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