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Powermate Maxa 5000 er will not run stably

I have a Coleman Powermate maxa 5000 er (model number 0525202, no .02 or any of that). It's been running fine, but after the last shutdown for refueling, and an oil change, it will not run stably after restarting. It runs nicely for about 2 minutes, then sputters, causing a voltage drop, then ramps back up to normal for half a minute, then sputters again. Never dies, but the voltage spikes are annoying(the lights keep dimming). Replaced plug with new Champion J17LM(and the old one was pretty well fouled out), still the same problem. Any suggestions as to the cause?

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  • aredknight Sep 25, 2009

    Thanks to buffalonyman. Fuel filter was somewhat plugged, but that led me to thoroughly inspect the fuel system, which led me to the carb jet screw, which had vibrated loose, causing a rich mix. Also discovered a thoroughly clogged air filter.

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Check the fuel filter. My company designed hybrid generators that are far more efficient. They use batteries to power your equipment, and the generator runs intermittantly to recharge the batteries when needed.

If you would like to convert to hybrid, contact me at buffalonymann@yahoo.com

Posted on Sep 24, 2009

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I have a coleman maxa 5000 PM525202; I bought it at a garage sale (didn't run); cleaned and rebuilt carb, changed oil, etc, and now it starts great and idles great. But ther eseems to be a part of the...


Parts lists for Coleman generators are here: http://www.jackssmallengines.com/coleman_parts_lookup.cfm

More detailed information about the engine can be found by using the engine model number. Look around the fan shroud or engine block. Coleman used different engnes, however your gen may have incorporated a Tecumseh 10 hp engine. Good luck

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It is not a problem like to know if i can use my coleman 5000 maxa er plus 10 hp. With A welder with out damage it. Tanks


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How do you convert the (2) 240 volt outlets to one twist lock connector on a coleman powermate maxa 5000 er genset


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