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Re: Coleman Ulti Mite (Fuji Robin Subaru) When I give it full (open) choke, it does not keep running. Please advise. Thank you

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6ya6ya
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Posted on Jan 02, 2017

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CarlGehrke
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SOURCE: Coleman Powermate 6250 only runs with choke closed/air restricted

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

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SOURCE: 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?

Posted on Jul 14, 2009

  • 909 Answers

SOURCE: 10HP Subaru/Robin gas on generator engine only

Not sure about the "extra jet" on te side of the carb without a specific model, but running smoothly with half choke indicates that your mixture is lean. Choking it richens the mixture.

The extra jet may be your idle stop, or it could be the idle mixture adjustment.

Posted on Jun 29, 2010

  • 185 Answers

SOURCE: I have a coleman Generator 1850. It stalls when i

Hello, I would check the carb for being dirty inside. It sounds like the needle valve is dirty, or not adjusted correctly, or there is rust in the carburator and any of these can cause the fuel not to feed into the engine properly. A good cleaning of the carb and proper setting of the needle valves should clean it up. Also check the screen in the fuel tank on the fuel valve.

Posted on Jan 22, 2011

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Hi Joe, I had asked for a little clarification and have not received any information. I will answer this question based on the generator is in good working order and it is a recoil start. Open the petcock, (this is the fuel valve) and give it about a minute to fill the fuel bowl on the carburetor. If your generator has an engine an on/off kill switch, set to on. If the generator has an auto idle switch set it to off. If the engine has a throttle lever located under the carburetor, push it all the way down (full throttle). Pull the choke knob out completely, there is a detent on the choke for half choke, pull it past this for full choke. pull the recoil starter rapidly. As soon as the engine starts running push the choke knob to half choke, this will allow the engine to run smooth while it's warming up. Depending on the climate that you are in, warm up time will vary. After a minute or two in cold climates start pushing the choke knob in, if it starts to run poorly pull it back out too the half position and let it warm up some more. When you can posh the choke in without the engine faltering it is ready to go. In warmer climates you might be able to start the engine without the choke or in the halfway position. Robin Subaru makes some of the finest small engines available. I would choose a Robin over a Honda every time. I hope this gets your generator going, and once again this is based on the generator being in good working order. Good luck, Michael Burke.

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1 Answer

What's the best choke setting for starting a cold generator


Full choke to start, open choke partially immediately the engine starts to where the motor runs smoothly, continue opening as soon as you can while keeping the engine running smoothly. Be sure to open fully before leaving the unit, running it with the choke partially on can cause a rich fuel condition which tends to wash the oil off the cylinder walls and it also dilutes the oil with gasoline.

lp

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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

10HP Subaru/Robin gas on generator engine only runs smooth with choke half on, what can cause this? also the extra jet on the outside of carb what does it do?


Not sure about the "extra jet" on te side of the carb without a specific model, but running smoothly with half choke indicates that your mixture is lean. Choking it richens the mixture.

The extra jet may be your idle stop, or it could be the idle mixture adjustment.

Jun 29, 2010 | Coleman Electrical Supplies

2 Answers

Is Husky 5000w a Chinese product?


Well tricky question ...Coleman factory is out of Wichita, Kansas that is there headquarters. but Subaru's head office is out of Nishishinjuku, Shinjuku-ku, Tokyo. so i think you have a mixed bag...good luck

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Where can I get an subaru engine manual for 10 hp


Here your are. Subaru engines are made by Robin. I don't know if Robin owns Subaru or Subaru owns Robin. Any time you need a manual you can get it from the Robin America site.

http://www.robinamerica.com/media/manuals/128547541213915000.pdf

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Coleman Powermate 6250 only runs with choke closed/air restricted


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

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1 Answer

ENGINE OVER SPEEDS WHILE RUNNING


This is almost surely a problem with the governor, check it like this.
Have someone with a finger on the kill switch.
Watch the governor arm while starting the engine, if it does not move almost immediately after starting the engine it is broken.
This is not a simple repair as it involves taking the crankcase apart, you'll have to contact robin/subaru to get a parts list in order to get the right governor spool and weights.
For an experienced technician this is about a 2 hour repair task.

Hope this helped,
Carl

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