Question about Coleman Powermate Premium Plus 6250W Portable Generator

2 Answers

Powermate 6250 loaps.

Filled new generator with oil and fresh gas then started engine. The engine loaps with the carb linkage moving back and forth on it's own.

I also do not see where engine speed is adjusted eventhough the Tecumseh manual says it should be. Any suggestions?

Thanks,
Bill

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  • Anonymous Dec 01, 2008

    severe surging

    , no load

  • Anonymous Dec 14, 2008

    I have the same issue with the 6250. But it is only when under no load or light load. I grabbed an old bare wire radiant heater (you know the kind that turns bright red and causes fires) and have that sitting out in the middle of my back yard on a can and as long as that is plugged in when no house load is on the generator runs perfect. If the house load comes online I can unplug the heater and it is still OK until the load ceases, Brand new gas and oil, the generator has only run about an huor before this,

  • beebob308 Dec 24, 2008

    I have the same problem with my coleman powermate 6250 ..Bought it 2 years ago and tried A couple of times to get it going but won't stop loaping for me ...Got discouraged and put it away ...The power is going out now and I still don't have power ...Kinda defeats the purpose of buy A generator ...lol Brought it to A small engine repair shop but he has no clue how to set the governor on it ...Would like A bit of help ...

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I took a new generator out of the box, filled it with oil and gas then started it. The govenor /carb linkage was moving violenting back and forth and the engine was backfiring.

I was able to get it to settle down by holding the linkage and closing the throttle plate a little but it would resume surging and backfiring when I let go of the linkage.

I tried again several weeks later. This time, after babying the linkage to get it to settle down, I moved the linkage about a 1/4 inch (which closed the throttle plate slightly) and lightly secured it in place with a ty-wrap. After running 10 minutes it finally settled down to where the backfiring stopped and the linkage stopped moving.

It was still okay after powering a heater motor and light.

I'm thinking that the problem with this engine is just that it needs a long warm-up time. I know very little about engines, so I could be wrong.

Bill

Posted on Dec 14, 2008

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I've never been a big fan of the 180 OH family of engines in these things, but here goes.
1 - If the engine will stay running while it surges, close the choke a little at a time and see if it settles down. If it does, there is something amiss in the carb. The carbs on these engines are very picky about tiny bits of dirt. The good news is that they are fairly simple to take apart and clean, the bad news is that lots of the parts are plastic and break easily. At least they aren't too expensive.

2 - I've seen 2 ways to adjust the governed speed on these engines; a spring that connects to the governor arm at one end and a tab bent up from the sheet metal that mounts on top of the engine at the other - bend the tab so the spring is tighter to speed the engine up, and (b) a jam nut and screw mechanism that presses against a lever that pulls on a spring that connects to the governor arm - screw the screw in tighter to raise the engine speed.
Note that in either case the mechanism adjusts the tension in a spring that pulls against the governor arm, this is helpful in finding out where to make the adjustment.
Here in the US we want our 2 pole generators like this to run at 3750 rpm at no load so that we get very close to 3600 rpm at load. If you're using a DMM to measure the output of the generator in Hz, you want 61.5 at no load.

If nothing you can do with the choke makes the surge go away, you might have a misadjusted governor. The Tecumseh service manual has a great procedure for making this adjustment, essentially what you do is loosen the retaining nut on the governor arm, twist the governor shaft to its minimum speed position, then hold the throttle assembly at the idle stop and tighten the governor arm jam nut. Always keep a finger near the kill switch when running the engine the first time after this procedure, it's easy to mess up and have a runaway engine.

Please rank me if this was helpful,
Carl

Posted on Dec 02, 2008

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You really need to get a factory Users Manual for your Genset there and read it through thoroughly!

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As for the OIL LEVEL - that is fairly simple - as all you do is unscrew (or in some cases pull out) the dipstick, and check the oil for proper level on the stick as well as cleanness (2 finger test like with car oil), and if it's even black or a silvery color then it definitely needs to be changed out NOW! Refill with fresh oil and your done there.

Check the Air Cleaner for cleanness as well, and service the filter if a foam element, or replace it if a paper element.

If the fuel tank has an in-line fuel line filter and it looks dirty change it out as well. Esp if the gas tank is made out of metal.

Check the spark plug for proper gap, and heat range, and burn color if the Genset has been run already. Should be a nice "light tan" color. If dark and wet - then you have Carb flooding problems.

That about covers it...

Anything else problem wise feel free to ask me here in post follow-up and I'll be glad to answer it for you.

Please post me a reply as to the found problem there, and the resolve to it by following my recommendations above. Also please rate my troubleshooting fix as well.

Keep me posted and I'll follow up as well.

Best regards,

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