Join Date: Sep 2002
Location: Friendship, Maine
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Rep Power: 15
Engine rpms fluctuating
Today, I started my 1988 Westerbeke 20B Two for the first time this season. I had replaced the filter elements in the Racor fuel/water separator, and the primary fuel filter earlier.
After bleeding the system using the manual fuel pump lever, the engine started just fine.
However, at any speed over idle, the rpms are fluctuating (over 1000 rpm range). Along with that, the voltmeter is fluctuating as well.
So, both gauges are going up and down continuously at any engine speed over idle. I can hear the engine noise pitch change as it fluctuates. Also noticed the temp gauge didn't seem to be registering at all, though the engine was warm (had an overheat issue due to coolant air lock, which I think I've fixed).
The weird thing is, the actual engine speed doesn't seem to be changing that much...not 1000 rpms worth. Seems just to be a little speed change. But, the gauges are jumping wildly.
Any ideas what might be causing this? I thought maybe air still in the fuel lines causing erratic running, but the fluctuation is constant (i.e. a steady up and down of rpms).
Thanks for any help!
It's not whether you're paranoid...it's whether you're paranoid enough.
1988 Sabre 30