Question about Coleman Powermate Premium Plus 6250W Portable Generator

4 Answers

Coleman Powermate 6250 only runs with choke closed/air restricted

New generator, purchased last year, used for the first time this weekend. (Major Ice storm in NH)

It starts and runs with full choke, but dies with choke off. It will run all day with the choke on or the airway other wise constricted.

Checked plugs after 18hrs of operation w/full choke and the spark plug looks clean, dry and grey...

Suspect carb is adjusted too lean, or not jetted correctly for operation in cold temps <25 deg f.

Problem: no apperant fuel mixture adjustment on the carb (subaru/robin Engine).

Any assistance would be greatly apprecated, thanks in advance.

Posted by on

  • 4 more comments 
  • dmsikora Dec 14, 2008

    I bought the same generator at the Salem NH Home Depot in the fall of 2007 and used it for the first time this weekend. Like you, it starts firts pull on full choke, though dies if you take the choke off even slightly. It will run fine, slight sputtering, for hours on choke and will die if you try to take the choke off. I pulled the air cleaner to make sure that the choke was labeled properly and everything looked correct. I pulled the plug and am seeing black soot on the plug as well on the exhaust. Soot is dry not wet. I ran the generator for about 5 hours oever the entire weekend. It sounds like we are having the same problem. My guess is that there is low gas flow into the carburator except when choke is on full, causing excess vacuum into the carb, drawing required gas. I have checked the gas flow from the shutoff at the bottom of the tank, that appears to be working correctly and not restricting gas flow. I would like to get this working clorrectly. I am concerned that leaving it running so rich will burn a valve of cause other issues with the generator.

  • ce_podesta Dec 14, 2008

    Agree that it's too much air to fuel.



    What I did was further restrict the air flow by stuffing a bit of rag into the air intake. Adjust until the gen runs w/the choke open.



    I checked the plugs this afternoon. 40 hrs of run time and the plugs are still clean...



    Still waiting for the power to come back on. 72 hrs and counting....





  • seymournh Dec 15, 2008

    Similar .... but different.

    Generator ran fine for two days (total of about 15-18 hours). It then quit and now will start and run from 30 sec to 2 minutes, then abruptly shut down. Seems like it suddenly runs out of gas. Checked fuel lines, etc. and all good. But - looking into tank there appears to be silver cloth-like 'thing' over the outlet hole - could this be a collapsed in-tank filter? Thanks

  • premeshmahes
    premeshmahes Aug 23, 2012

    I have the same problem. I have a Coleman Powermate Generator 6520 watt 10 hp. I can run it only on Choke, Run then falls directly out. Does anyone have an idea why???? And I also have a problem with my switch. He was quite a while loosely thrown so now I can not remember what kabbel where to go. Please help

  • premeshmahes
    premeshmahes Aug 23, 2012

    I have the same problem. I have a Coleman Powermate Generator 6520 watt 10 hp. I can run it only on Choke Run then falls directly out. Does anyone have an idea why???? And I also have a problem with my switch. He was quite a while loosely thrown so now I can not remember what kabbel where to go. Please help

  • premeshmahes
    premeshmahes Aug 23, 2012

    *6250

×

4 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

A call to Elliott Small Engine solved my problem - Oil Guard. I had checked the oil and it was just a little low but seemed well within the normal range. I was told to add more, bringing it just over the Full mark. It seems that the low oil protection system is very sensitive and shuts down the engine even when the oil is withing 1/8" of the mark. I added about 2-3 oz of oil and no more problems

Posted on Dec 16, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have the same problem. I have a Coleman Powermate Generator 6250 watt 10 hp. I can run it only on Choke Run then falls directly out. Does anyone have an idea why???? And I also have a problem with my switch. He was quite a while loosely thrown so now I can not remember what kabbel where to go. Please help

Posted on Aug 23, 2012

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Thanks Carl. Briggs & Stratton told me the same thing yesterday. They said that the intake could actually build ice in low temperatures and that it is considered normal to have to run on full choke in such weather. They did not feel this was an issue as long as it was not blowing smoke. B&S was actually quite helpful and got several people involved including an engineer from their generator division.

Posted on Dec 16, 2008

  • ce_podesta Dec 08, 2013

    Issue was a clogged jet. Came from the factory that way.... Opened up the carb and discovered that the jet was 95% clogged with a very hard sudstance. Cleaned it out and it rand fine.

×

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 169 Answers

Hi folks,

You're both right to think that these engines were not intended to work at extreme low temps and that's a factor here.
The dry black soot on the plugs is probably just oil getting into the intake thru the breather, maybe check the air cleaner.
On some of the generators I've worked on there was a small plate in the air cleaner cover that slightly restricted air flow into the carb for low temp operation. Both of you might want to try getting a cardboard box quite a bit larger than the generator, cut a couple of holes in it to let exhaust out, and put it over the generator so that the air going into the intake gets heated a little bit by the engine. You'll want to monitor the generator pretty closely so I wouldn't recommend this overnight. You both should also be extra careful about the right amount of oil in the sump and changing it more often than usual.

My thoughts are with you folks,
Carl

Posted on Dec 15, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Power cord does not retract immediately


Coleman Powermate Generator 5000 Watts / 6250 Watts ...

? 3:27
https://www.youtube.com/watch?v=IROa5QfPqkU
Nov 8, 2012 - Uploaded by Carlos Roman
This 5000 watt generator is great for backup power at home or forpower ... Coleman Powermate Generator 5000 Watts / 6250 Watts ... This feature is not available right now. ... folding handle, 1 quart, of oil, and 25ft generator convenience cord. ... How to convert a generator recoil starter to an electric starter!

pull cord won t retract Power Generators Questions ... - Fixya

www.fixya.com > Forum > Tags > pull cord won t retract
Power Generators pull cord won t retract questions and answers. Ask your pull cordwon t ... Question about Powermate Powermate 5000W Generator. 2 Answers · I was running my coleman powermate 6250 gen power ... cord 6250 trips out ... The pullcord does not rewind onto the pulley when pulled. At first I thought it was ...

Best Portable Generator Reviews



Feb 03, 2016 | Coleman Powermate Powermate 5000W...

1 Answer

Power mate 6250. Starts and runs fine until I take the choke off, then why does it die?


Coleman engine starts runs short time quits Power ... - Fixya

www.fixya.com > ... > Power Generators
Coleman Powermate 6250 only runs with choke closed/air restricted ...starts and runswith full choke, but dies with choke off. ... some gas in the cilinder through the plug hole)and start the engine until it runs constantly. bestregards ... Ad ... I use a fuel stabilizer ... ...engine runs fine but produces no power at all to the breaker.

Coleman car starts but will not stay running Power ... - Fixya

www.fixya.com > ... > Power Generators
Question about Powermate Premium Plus 6250W Portable Generator ... squirt a little gas in the carb it will run until gas is gone doesnt seem to get gas from . ... ...starts and runs fine for about a minute, then dies as though starved for fuel. ... load up on fullchoke and stay running around 3/4 choke HI, Turn off the gas and take ...

Generator runs then shuts off - YouTube

? 8:17
https://www.youtube.com/watch?v=6esHkPyygWw
Sep 6, 2011 - Uploaded by mainblind
How to make Generac generator run bypassing the low oil sensor and ... Remove all; Disconnect .... My ...

Jan 13, 2016 | Coleman Power Generators

1 Answer

I have a coleman powermate premium plus 6250 generator,put in new plug ,new filter ,changed oil,cleaned the carb,put in new gas. runs ok at half choke but when go full choke it starts backfiring and runs...


if you are running the engine at full CHOKE, then it is flooding the engine, but if you meant off full choke, then the carb is still stopped up. Try soaking in carb cleaner overnight after removing jet & all rubber goods. HOPE THIS HELPS.

Dec 17, 2010 | Coleman Powermate Premium Plus 6250W...

1 Answer

Coleman 6250 generator runs rough


Fresh fuel? Does carburetor have adjustable jets? Turn the high speed jet (at bottom of float bowl) about 1/4 to1/2 CCW (looking at bottom of bowl). If no improvement, carburetor should be torn apart and cleaned. This also applies if there are no adjustable jets. Is there a fuel filter anywhere?

Jul 14, 2009 | Coleman Powermate Powermate 5000W...

1 Answer

Coleman Powermate 6250 generator only runs with Choke on? pull


Cbronson
how old was the fuel in the tank and carb bowl? This could have built up varnish and make the float heavier
Another issue that my customers bring in are 4 stroke generators that have 2 stroke fuel put in tank.

Jan 14, 2009 | Coleman Powermate Premium Plus 6250W...

Not finding what you are looking for?
Coleman Powermate Premium Plus 6250W Portable Generator Logo

2,304 people viewed this question

Ask a Question

Usually answered in minutes!

Top Coleman Power Generators Experts

John Trevino

Level 3 Expert

1378 Answers

Phil Rivera

Level 2 Expert

83 Answers

Phil Walker
Phil Walker

Level 3 Expert

602 Answers

Are you a Coleman Power Generator Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...