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Old 21-05-2012, 10:41   #1
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Westerbeke w30 occasionally over revs

Intermittently, my engine will climb a couple of hundred revs from cruise power for 10-15 seconds, then return. Usually not until the engine is warm, and very intermittently. On a recent cruise, didn't do it at all one day, once an hour or so the next.

Any clues on what to look for? One crew suggested a fuel system air leak, but I would think it'd hesitate instead of over revving......


Tia,

Matt
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Old 21-05-2012, 10:51   #2
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Re: Westerbeke w30 occasionally over revs

Sounds like a fuel starvation issue. Filters , lines, plugged pickup tube in tank?
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Old 21-05-2012, 10:57   #3
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Re: Westerbeke w30 occasionally over revs

Quote:
Originally Posted by Cheechako View Post
Sounds like a fuel starvation issue. Filters , lines, plugged pickup tube in tank?
+1 It may only be running right for what you think is the surge time, starving the rest.
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Old 22-05-2012, 14:34   #4
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Re: Westerbeke w30 occasionally over revs

I'm running on a jury rigged fuel tank (Jerry can), new rancor filter. Haven't tried changing the secondary, but it was changed the week before I grabbed the boat. Will change that out when back at home.

Good point on maybe starving most time, never thought of that.

Hoping it wasn't a governed issue or something mechanical

Matt
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Old 22-05-2012, 14:52   #5
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Re: Westerbeke w30 occasionally over revs

If it was starvation, during running, I would think you could not increase the RPM's with the throttle.
I would think one faulty injector.
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