Engine runs today--dies tomorrow - SailNet Community
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post #1 of 8 Old 09-25-2012 Thread Starter
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Engine runs today--dies tomorrow

I am having problems with my westerbeke century 120 hp.. After bleeding the fuel system. The engine runs fine for hours but the next day it will only run for 5 minutes or so .Emptying the racor.. Prime it again, runs for hours and then the next day the same thing.. I have replaced all filters, checked for blocked fuel tank vent, loose fittings on all hoses, switched fuel tanks, checked o-rings on racor, swithced to other filter on dual racor and the same happens everytime.. I cannot think of anything else to try.. Help
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post #2 of 8 Old 09-25-2012
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Re: Engine runs today--dies tomorrow

That's a big engine! Either a very large boat or a MacGregor.

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post #3 of 8 Old 09-25-2012
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Re: Engine runs today--dies tomorrow

Here's what I recommend: Go sailing today. Don't tomorrow.
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post #4 of 8 Old 09-25-2012
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Re: Engine runs today--dies tomorrow

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Originally Posted by sidsail View Post
I am having problems with my westerbeke century 120 hp.. After bleeding the fuel system. The engine runs fine for hours but the next day it will only run for 5 minutes or so .Emptying the racor.. Prime it again, runs for hours and then the next day the same thing.. I have replaced all filters, checked for blocked fuel tank vent, loose fittings on all hoses, switched fuel tanks, checked o-rings on racor, swithced to other filter on dual racor and the same happens everytime.. I cannot think of anything else to try.. Help
Maybe an air leak downstream of the dual Racors. If you can pressurize the system with an electric pump right out of the tank the air leak may become a fuel leak which should be visible?

The Diesel Page, Electric Lift Pump and Racor Filter installation

Or, you may have a hose that is collapsing inside? Possibly replace all hoses, starting downstream of the Racors?

Paul T
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post #5 of 8 Old 09-25-2012
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Re: Engine runs today--dies tomorrow

Paul beat me to it. Good advise. A collapsed hose will stop fuel, cause a vacuum and air will get in somewhere, thereby creating the need to bleed the system. Looks like an air leak but in reality is a collapsed hose. Probably the hose from the tank selector to the Racors.

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post #6 of 8 Old 09-25-2012
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Re: Engine runs today--dies tomorrow

I suspect there's a small air leak - just as others have posted.

Good luck,

Gary
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post #7 of 8 Old 09-27-2012
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Re: Engine runs today--dies tomorrow

I would be tempted to run a pressurised fuel system.
Stewart Warner make some good electrical fuel pumps.
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post #8 of 8 Old 09-27-2012
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Re: Engine runs today--dies tomorrow

We had a Westerbeke that had a similar problems off and on. We discovered, over the course of several years owning that boat:

-Loose electrical connection to the fuel pump (discovered this when we were replacing the fuel pump on the guesstimate that it was bad)
-Bad solenoid
-Misplaced gasket on one of the filters, leaking air into the system

Good luck. Frustrating as all get out!
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