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Volume of returned fuel?

1853 Views 10 Replies 9 Participants Last post by  capecodda
I have a Yanmar 4JH2E. Curious if anyone knows how much fuel is returned to the tank? (And if anyone answers "all of the excess" I'll hunt you down and wind your furler backwards! :) )

The reason I'm asking is my boat has two tanks. I run mostly off the bow tank, fuel is returned to the keel tank. Just wondering if I need to be concerned about overflowing the keel tank with the return fuel.

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My old Albin AD2 had the return line connected to the secondary filter, and I'm pretty sure that was the factory setup as it was shown in the manual. Boat had two tanks and a selector valve on the feed, it worked very well that way. You would think it would be harder to bleed the engine with that setup, an air bubble could recirculate through the system multiple times, but I never had a problem with that.
That engine returned very little fuel though, like a few drops per hour.
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