Join Date: Jul 2007
Location: Northern Virginia
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Re: Yanmar 3GMF primary fuel filter change
Another thing to keep in mind is that if the pump cam is in the wrong position--luck of the draw--you can move that little sucker all day and not pump any fuel. You should be able to feel a little "pumplike" resistance over some of the movement. If not, rotate the pulley a little bit and try again.
If you really changed the primary--which would be the Racor or whatever is outside the engine--and didn't fill it, you could easily have 10 minutes of pumping to do, maybe more. If you just replaced the secondary filter--the one that is on the front of the engine--a few minutes should bring some fuel out the bleeder. BTW, it's easier to see if you are pumping something if you leave the bleed screw almost closed--you'll be able to see some air and bubbles there, especially if you put a drop of diesel on the bleeder screw as an indicator.
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Northern Chesapeake Bay
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