Home › Forum › Ask A Member › 1963 EVINRUDE 40 HP EVALUATION › Re: 1963 EVINRUDE 40 HP EVALUATION
December 8, 2015 at 2:43 pm
#28231
Well, there are other types of fuel pump failures than a leaky diaphragm that would cause low fuel pressure. BUT, air leaks/restrictions can disguise themselves as fuel pump problems as well. How about the fuel supply? Is it fresh, perhaps there is some water in the fuel causing the engine to stall out. How about the high speed jet, did you actually remove and inspect it?
Finally, be sure the engine isn’t overheating causing the stalling at high speeds.
Perhaps there isn’t enough oil in the fuel causing the engine to seize stall at high speeds, sure hope I’m wrong about the overheat/low oil seize possibilities!