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Old 06-03-2015, 11:26 AM   #3
jleonard
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I would check the voltage to the solenoid with the preheat switch activated.
If voltage is low, it maybe because of green wire somewhere in the circuit.
The solenoid needs to pull in completely or it will overheat. I know this because I worked at a company that made solenoid valves (same principle).
I also have a 4.4 Westerbeke with probably the same solenoid. It has to be mounted such that it pulls all the way in. That "may" have been the reason your new one burned up????
You can check the old solenoid by putting 12 v (and ground) to it without the rod connected to the pump linkage (or on a bench, etc) it should pull all the way in if it's good.
Sometimes the bore or the plunger gets dirty or corroded a little and that amount of resistance will be enough to prevent the solenoid from pulling all the way in.
I had a hesitating solenoid and after cleaning it worked fine.
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Ex boats: 1983 40 Albin trunk cabin, 1978 Mainship 34 Model 1
New Port Richey, Fl
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