My engine mechanic used a motorized pump that he used to suck the oil out of the drip pan. He added a small metal tube insert on the hose end, and attached it to the return hose after the injectors, that also goes back into the top of the fuel filter housing instead of the tank on my 2QM15. When he applied the suction, the fuel was pulled from the tank, through the Racor filter, past the mechanical pump on the engine, into the fuel filter housing, into the injector line, and when some came into the waste oil bucket, he shut the pump down, and re-attached the return hose to the fuel filter housing. Thus priming the entire system. Worked really well. My engine started up on the first try. You could do the same thing with a hand pump as well.
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1980 Pacific Seacraft Orion 27
Sailing Grounds: Southern California