Question about Coleman Powermate Proforce 6,000 Watt 12 Hp Portable Generator #PM0106000

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Screeching noise from eng? dry bearing? Brass(?) dust in oil?

12 HP Sumec eng. Made noise when new out of box. Thought was gen at 1st, now think its eng. Has about 5 tanks of gas thru it. Seems to run OK, really loud dry bearging - like noise comes and goes a little but is there most the time. CKed oil = lot of suspended metal in it. Looks brass colored.
Tag says 7SUMS . 3572GA EM
any parts available? Have not tore eng down, if can't get parts may as well run till flies apart?
Surely crank bearings are oil bath? What is in there that may sound like dry bearing?
Thanks for any help, insight,
Mike Toalston

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  • cairorpr Dec 15, 2008

    Sure sounded like it! Wasn't any good the way it was so I tore it down to find out what could possibly be making noise like a bad alternator bearing. Ruled out the generator bearings.There is a balance shaft with 6202 bearings in the eng! Junk bearings from git go, or bad lube problem? I tried to improve by drilling passage to rear of bearing, (splash system) looked like it shouldn't weaken casting but provide more lube. Sounds normal now. We'll see if it lasts. Maybe the bearing was damaged when installed. Inexperianced or careless worker. As we repair alt & starters, we had bearings on hand, removed seals and grease and away we go!

    Thanks for your reply.




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I think there is an engine problem.Disassembly entire engine and check all the parts inside(the cilinder, the crankshaft,the piston,the conecting rod,the piston rings,the camshaft(pay attention to the timing points at the gears),the oil pump,the gaskets and so on.
best regards savumihai71

Posted on Dec 13, 2008


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