Westerbeke self-bleeding fuel system - SailNet Community
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post #1 of 3 Old 04-03-2017 Thread Starter
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Westerbeke self-bleeding fuel system

I am a complete diesel noob. I had a gas engine in my last boat. I read in my Westerbeke W27 owners manual that the engine is self-bleeding. Have you all found that this is sufficient to get air out of the lines (such as after changing filters)? If it is, it kind of begs the question, 'why aren't all diesels self-bleeding'? Is there a down-side to this feature?

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post #2 of 3 Old 04-03-2017
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Re: Westerbeke self-bleeding fuel system

I have only seen self-bleeding systems on Universal and Beta Marine Diesels. These systems work with an electric lift pump, and requires the pump to push sufficient fuel volume to supply the injector pump, and the return lines to the injectors. Other than the requirement of a functioning electric lift pump, I see no downside. I have seen self-bleeding systems that were "always-on" in that there was no operator intervention required, and have seen them where the operator had to open a bleed valve to enable the self-bleeding to take place. I have one with the bleed screw on my Universal M25.

Why don't other manufacturers do this? it may have to do with the pressure required on the inlet side of the high pressure (injector) pump. IMHO this should not be an issue.

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post #3 of 3 Old 04-03-2017
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Re: Westerbeke self-bleeding fuel system

The Westerbeke system works very well but it is an electric pump. Highly recommend you carry a spare. As long as you get the fuel filter gasket seated properly you should have no problems bleeding.

Westerbeke do not make diesels, they simply buy them and marinize them then paint them red. With a little help from google you can find out what make your engine actually is and buy much less expensive parts. i.e. My Westie is a 55hp Mitsubishi.

Get the part number off the electric fuel pump and buy one at any auto parts store for 1/5 the price from Westerbeke.

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Last edited by boatpoker; 04-03-2017 at 12:38 PM.
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