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I have a 20 kw westerbeke diesel generator that surges speed wise.?

I can visually see the electronic speed actuator moving in and out when this is happening. Should I replace the actuator or could it be something else. This is in a boat.

Public Comments

1. I would first replace the primary and secondary fuel filters. It could have a governor problem in the injector pump. The fuel transfer pump may be bad (not keeping the injector pump body fully charged). The "actuator", actually may be the run/kill solenoid. If so, some have two windings, a "pull in" and a "hold". Check to see if voltage is constant on the hold winding when it is running. Most generators that I have seen and worked on, have a fixed throttle setting on the injector pump. http://westerbeke.com/Products/OnlineManuals.aspx
2. There are several models of the 20K Westerbeke. Can you post up which model you have? It could be as simple as an adjustment. The actuators do not generally fail. However, if you have a lot of hours, say 2000, then the actuator spring may be worn out. Please post up your model and I will see what I can do. Also you can email me.