Mariner 225 efi offshore 1997

by Greg craytor
(Modesto ca United States)

Some times it will run great at wot and others it will only run around 4300 rpm but when it don’t do that I get 5300 rpm out of it and the book said I should be getting 5900 to 6200 at top end. It’s on my 1991 21’ barefoot Sanger with not much extra weight at all and a 21 pitch 3blade the boat will literally leap out of the whole shot. I have tryed squeezing the primer bulb at wot no difference. Can’t figure this thing out

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