Question about Coleman Powermate Premium Plus 6250W Portable Generator

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Noisy muffler how can i quiet my 6250 gen.

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Put a much larger muffler on it. 

Posted on Feb 04, 2009

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1 Answer

How to modify powermate 6250 muffler to make quiter

I wouldn't recommend modifying the muffler, doing so would change the OEM's engine back pressure specifications and can lead to engine damage and carbon monoxide leakage

Aug 15, 2012 | Coleman Powermate Premium Plus 6250W...

1 Answer

To loud, do they have a better muffler kit

Most likely a different muffler is available for easy bolt-on solution. Best way to check is to find model and type of engine and check with engine distributor in your area or the web. Engine model is usually found on the starter/fan cover or the block. The problem is the limited space within the frame of the generator. Other solution is to contact a small engine service center for modification. There are several sources for quiet mufflers, however takes creative installation. Take a look at other generators with very quiet mufflers for ideas (different types of machine may use the same engine so take notice how other types lawn equipment /tools deal with noise ). Some generators are made for camping or use in quiet zones and use other methods for quieting the unit. Still other generators are noisy even with large mufflers. Good luck with your project.

May 02, 2011 | Coleman Powermate Powermate 5000W...

1 Answer

I have a Coleman Powermate 5500 Generator. It is

This engine was not built with quiet in mind, it was built to be cheap. upgrading the exhaust is your best bet and likely the cheapest. Talk to a small engine shop about the possibility of using a muffler from an ATV.

Super Trap makes a fantastic muffler, if it will fit your application (most do). A link has been provided at the end. When you are looking at the various options, you will notice that a rating in db units. Reducing noise by 3db is half the original noise level.

if you can, go with the SuperTrapp. If still noisy (probably won't be), then add on the resonator as well. Downside to using aftermarket is that you will have an exhaust stack / system that sticks out the side of the generator. Upside is that you will be able to think quietly about how much the exhaust sticks out.

And no, I don't have any connection with Jack's, they are just the first hit that came up. Now that you know that something is available, you can do more research on it.

Jun 05, 2010 | Coleman Powermate Powermate 5000W...

1 Answer

I need to quiet down my 6250

Not all the noise is from exhaust. The mechanics and the telegraphing of sounds via the feul tank and frame are major noise sources as well.

You MIGHT want to consider building a small enclosure, paying attention to venting and fireproofing..

I have heard of people building an enclosure from concrete blocks for this purpose.

You could try the exhaust by adapting with stainless flex pipe to connect to a standard automobile muffler. I have also seen the exhaust "plumbed" into an underground tank to deaden the sound.

Jan 09, 2010 | Coleman Powermate Premium Plus 6250W...

1 Answer

I need to find a silent muffler that is quiet, I am wondering if there is a really quiet muffler that either bolts on, or i can fabricate the bolt on end to the pipe of another muffler that is quiet if...

The quietest muffler I ever had, was one that I made. It's a water muffler. You have to mount the motor at least 3 feet above the water, so there is no chance of the water back flowing into it. Just fabricate an exhaust pipe that runs from the motor to a LARGE container of water. The larger the better. Take it at least half way into the container. All you will hear, is bubbles and a little resonance from the water container.

Oct 22, 2009 | Coleman Powermate Premium Plus 6250W...

4 Answers

I have a Coleman Powermate 6250. Runs Great, No power to outlets!

Excite the genset.

with the gen engine running,
1) plug a 3/8 drill into an outlet,
(make sure the drill is set to the forward rotation)
2) hold the trigger in the run position
3) by hand, rotate the drill chuck with a quick flip of your wrist.
*** NOTE: BE PREPARED !!! this will excite the gen-set and the drill will start to run as normal.

Oct 07, 2009 | Coleman Powermate Premium Plus 6250W...

2 Answers

Powermate 6250 wont start

try checking the WKM setting...i dont know what its called in english....but we call it WKM ...on my gen. its a peice of metal (with OHV written on it)...if you don't know how to set it...send me an email at

Sep 05, 2009 | Coleman Powermate Premium Plus 6250W...

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