Question about Coleman Powermate Premium Plus 6250W Portable Generator

3 Answers

Stalling on my coleman 6250w portable generator

3 yrs old and won't stay running after priming with gas. Stalls in 3 seconds. First time being used. What could problem be and how do I fix. Please describe location of parts involved and what to do?

Posted by on

3 Answers

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Contributor
  • 32 Answers

Ajust the float in your carb (bend the brass tab in that the top of the needle valve touches)and clean this needle valve. the bowl can be removed with a 7/16 box wrench on the bottom brass nut that is also a needle jet (clean this jet ,some models it is just a jet, others it is ajustable and needs to be 1 turn out to start then ajust wile running hot untill it stops surging) the problem is not allowing enough fuel to fill the float bowl

Posted on Feb 05, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 72 Answers

My answer:

Not knowing your exact model #, and knowing only that you say it is 3 years old - TOTAL RUN HOURS unknown as well? - I can only give you several possibilities of what the problem might be - even though I don't know the exact model # and which engine you have on the Genset. Coleman does not mfr much of anything today, but like with many USA companies out there today it does private label out to a lot of mfg vendors (mostly in China btw), and the Genset gas engines are numerous. From Briggs & Stratton to Honda to Subaru and so forth...

I also don't know what normal LOAD you are putting on your Genset there, or have been putting on it previously, or at what RPM you are normally running the engine at - as to half throttle or full throttle setting?? I take it that it's a Briggs & Stratton 4-stroke single cyl, or is it a Honda 4-stroke single/twin cyl engine?

Since I take it that it has been running good up to now - i have a few ??'s as to how you have been running it recently. What do you mean when you say - "First time being used." Are you talking about the 1st time this year being used - or what?

Since Gensets need to be run a minimum of 10 minutes every 30 days (every 1 month religiously), or whatever your owners manual recommends - if you haven't been doing this, or don't run the gas out of the Float Bowl before shutting the Genset down after each use - then most likely the Carb is gummy or possibly has dirty gas in the bowl and is the problem.

I seriously doubt you did any damage to the engine beforehand - running it the last time out - unless it was ran low on oil - in which case it should have a LOW OIL cutoff switch mounted in the lower engine case close to the CHECK OIL port.

If the LOW OIL switch is working properly and adjusted properly then you shouldn't be getting any engine cutout - that is unless either this OIL LEVEL float switch is mis-adjusted, or else the OIL LEVEL is indeed low. (ie: switch is mechanically set too low, as then when the oil level is indeed at it's proper level the switch would be already shorting out to ground) (See your operators manual for proper setting)

First and foremost always check your OIL LEVEL and make sure you have changed it out according to your owners manual!!!

A way to check for proper operation of the LOW OIL SWITCH is to temporarily disconnect the (usually) BLACK wire from the LOW OIL switch when the engine starts to cut out. If the stalling out problem goes away completely then the LOW OIL switch is either mis-adjusted, or else it is going bad from vibration. Also check this if it's not starting - as it may already be shorting out the Maintenance-free Magnetron® electronic ignition, and thus sending NO SPARK to the SPARK PLUG. Pulling the SPARK PLUG out and grounding it properly on the engine head or any grounded metal surface will affirm this. (Again see your operators manual for proper adjustment and/or check out procedure)

Electronically this LOW OIL switch should be the only thing that would protect the engine from damage should the oil level fall below recommended level. Other then that it may have an electronic REV LIMITER if it's a bigger and more expensive model, but usually not.

I doubt the Maintenance-free Magnetron® electronic ignition is at fault, but could be weak and going bad. Always a possibility, but I would 1st rule out everything else first.

Since the/your Genset runs for only 3 secs and then starts to cut out I would look more for like a fuel vapor lock (partially closed or clogged gas cap vent), a possible dirty fuel filter, possible water moisture in the gas tank or in the carb bowl, possibly dirty carb in general along with it's dirty Float Bowl, Float Pin, Float and Needle Valve, and any Adjustment Screws that go Into the Carb Body.

It's hard to say unless the Carb first is broken down, checked for proper Float action setting, and/or cleaned out accordingly if dirt is indeed present in the bottom of the Float Bowl.

If all looks good there Carb Bowl wise then you will next need to check the air/fuel mixture Jet Adjustment Screws.

Let me know if you should need that adjustment procedure after you first check out everything else I stated above?

That covers everything from a fuel standpoint.

Again - You do know that all Gensets should be started and run for at least 10 mins every 30 days - right? If you didn't know this - now you do! Every good operators manual should state this.

It just does sound like it's starving for gas unless it's building up a (vacuum) or vapor lock in the gas tank.

The gas tank fuel line does have an in-line fuel filter correct? If it doesn't you definitely need to add one for dirt protection!!

Having covered everything from an Electronics/electrical/fuel standpoint engine wise - there is only one other thing left Genset wise.

Beings your Genset is said to be 3 years old, and it just indeed might have some high RUNTIME HOURS on it - it just could very possibly be what sounds like to me (and I personally HAVE SEEN this happen myself firsthand) that the generator brushes are nearly shot - as in almost worn out. They may be getting too too hot - as from excessive current draw at point of contact, and thus the generator sensing circuitry itself is doing an electrical CUTOUT!!

An added protective Genset circuit feature in that the generator itself may indeed be linked to the engine as a type of REV LIMITER or CUTOUT on the Maintenance-free Magnetron® electronic ignition. Again - your operators or service manual should have a pretty good troubleshooting section in it unless you don't have that anymore or never got one if you bought it used to begin with.

If you unscrew & remove the Generator brushes, and they are indeed below the recommended length (or worse case they are indeed totally worn down) then that most likely is your problem right there.

If you choose to replace the old brushes with new ones yourself - be very careful when seating the new ones - as to their insertion and cap retainer tightening. Never over-tighten those black plastic-like brush retainer screw caps - for if you break one (hard to get immediate replacements is why), or fracture one it could cause the Genset to fail under LOAD, and that very well could do some severe damage to the generator part itself. Take your time doing it, and be patient!!

It has to be one of the scenarios listed above, as I've covered every possible cause short of a broken wire somewhere - which in that case you will have to schematic trace and Ohm out wire to wire contacts. This being the least likely scenario from experience.

If you indeed find the Float Bowl assy to be the cause of dirt contamination or varnish build-up clogging the Carb, and you need a walk-through of taking it apart, cleaning it out, and then re-assembling it again - as well as re-adjusting the fuel mixture Adjustment Screws - just give me a shout here, and I'll walk you through it step by step.

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,

Frank

Posted on Sep 02, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Simple... if the engine is fireing, the problem is the carborator and/or the sparkplug. Take the the carborator off then take it apart and give it a really good cleaning... if it has a diafram...replace it and if it has a bowl...seal it really well.

Posted on Dec 06, 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 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

Powermate PM0545007


With mine I add 'dry gas'. My local store carries Sta-Bil, yours will have something compatible (if not this one). Even if the gas is new, moisture can still be in the tank. Use as directed.

I use it in my snowblower, tractor, generator and cars.

Hope that cures your problem as it has mine.

Feb 03, 2013 | Coleman Powermate Premium Plus 6250W...

1 Answer

WHOW LONG CAN OIL SIT WITH NO USE


Oil itself actually stays good pretty much indefinitely. The problems is the additives in the oil break down. The problem with anything sitting is the crankcase gets moisture in it and the engine doesnt heat it up enough to boil it off. So after all this said, just change the oil. You will be better off in the long run.

Aug 21, 2012 | Coleman Powermate Premium Plus 6250W...

1 Answer

Generator only starts when primed then immediately stalls. I 've changed plug,drained gas and cleaned carb. still won't run


Ok, is it a Briggs&Strattion engine? if so it most likley has a fuel pump that works off vacume on it, I had one go bad

Aug 27, 2011 | Coleman Powermate Powermate 5000W...

1 Answer

Powermate plus 1750 portable generator. Has fresh gas, will just runs a couple of seconds on starter fluid and just stops.


It could be a number of thinks. plugged fuel line, carburetor, but dont use to much starter fluid this can burn a hole in the top of your piston. check to see if its getting any spark.

Aug 14, 2011 | Coleman Powermate Premium Plus 6250W...

1 Answer

Will not start. If I spray gas in the carb it will run for 2 seconds.


Sounds like no fuel, check for a clogged filter, stale gas, pinched fuel line. Check air filter as well.

Jul 26, 2011 | Coleman Powermate Premium Plus 6250W...

1 Answer

Looking for owners manual for coleman powermate 4000


Hi

First you need to change the plug with a new one with the same heat range(too long time).Priming the engine few times(put some gas in the cilinder through the plug hole)and start the engine until it runs constantly.

bestregards savumihai71

Feb 06, 2009 | Coleman Powermate Premium Plus 6250W...

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

925 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...