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Roosa Master injection pump issues after rebuild
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DHRed
Posted 2/5/2024 11:12 (#10609661 - in reply to #10608455)
Subject: RE: Roosa Master injection pump issues after rebuild


east central Nebraska
There is no way for the plungers to get out of line. They rotate with the rotor. It sounds like there is air in the head. Remove all the nozzle lines from the nozzle end and crank it over until you have solid fuel shooting out, not just a dribble. Many times I have had to put a little air pressure in the fuel tank with a blow gun and a rag to push fuel into the plungers while cranking because it does not have a lift pump just gravity to push the fuel. Do this with the timing cover loose. Removing the cam advance plug drains fuel from the head.
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