Question about Coleman Powermate Premium Plus 6250W Portable Generator

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I have an older model Coleman Powermate 3750 Premium Plus. It is not charging. What do I need to replace?

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It can be the voltage regulator that's in the control box or most likely the rectifier in the back side of the gen head it looks like a 1 inch by 1 inch by 3/8 inch black cube with 4 wire posts on it with a hole in the middle for mounting these will go bad in time and are currently avail in electronics stores even radio shack has them make a diagram and mark the wires to where they go on it and mark the rectifier as well they can be cross ref to newer ones as well their just a couple bucks get a spare to have do to a older machine this part is not in the catalog of the manufacture and un avail from them yet they are other places hope this helps

Posted on Aug 30, 2010

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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Go to They'll give you a printable manual in pdf format . No charge

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Your battery charge rectifier is not working. Measure the input voltage going into the rectifier. Should be around 30Vac. If voltage is present then you rectifier is bad.

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Misplaced User Manual for Coleman Powermate 6250

I would run a search on line for your model number. I will look and let you know.

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To find a manual for this generator go to and search your model and serial number. Good luck!

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