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I have a Coleman PowerMate 1850 and it fails to run more than a few seconds. The fuel, gas and switch are on but it sounds like it is not getting gas. I run the carb dry after each run and use a fuel stabilizer. The unit is 5 years old but maintained well. Does the carb need to be rebuilt?

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Sometimes if you "run dry" you can shrink the needle valve on the float bowl. when you fill with fuel it will get stuck in the hole that lets the fuel into the bowl.

Posted on Oct 21, 2013


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Posted on Jan 02, 2017

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SOURCE: coleman powermate 6250 generator will not start

I have one of these generators, and I can tell you that at least once a year, I have to pull the petcock type assembly off tank, and clean it. I also drain and clean the tank. It gets a sediment build up, and the petcock system isn't the greatest in the world. I'm going to say that you either have a problem in the petcock type assembly, or you have a stuck jet in the carb, either of these can happen with it sitting for the long period of time. Start by removing the fuel line to the carb and checking the fuel flow. Sounds like you may have already done this, I'm unclear on that. Then I would remove the carb, and soak it overnight in a penetrating oil. This will loosen up any rust or parts that may be sticking. One other thing you may consider, depending on where you live, you may have a mud dauber or wasp nest in the intake or other critical area of the engine. I still get amazed at where I find mud dauber nests occasionally, the little buggers seem to be able to get anywhere.

Posted on Sep 05, 2008

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SOURCE: have a colemene powermate that will not stay started

Check the Oil. If it is low, the Low Oil cutout will shut the engine off after a few seconds. If the oil is full, try disconnecting the oil sensor. If this makes it run, you will need to diagnose and repair the cutout system.

Posted on Jan 21, 2009

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SOURCE: I have a Coleman Powermate Pulse 1850 Generator.

If the generator hasn't been used for awhile the rotor may have lost it's magnetism. All you need is to re-excite it. There are several websites that explain how to do this. It's a good place to start.

Posted on Apr 04, 2009

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SOURCE: pull start recoil assembly

I bought a replacement recoil starter for my 1850 at Pats small engine parts. The part number for a 3.5 B & S is 499706. If you look on the heat shield on the side of the motor there is the engine model and s/n. Hope this helps.

Posted on Jun 12, 2009

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SOURCE: What oil do I use in a Coleman Powermate 1850

Even though Powermate generators are discontinued they still have a website with owners manuals at

Posted on Sep 30, 2009

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2 Answers

My older Coleman Powermate Pulse 1850 is leaking gas from the grommet that connects the hose to the tank. I cannot get needle nose plyers inside the tank to tighten the nut (if there even IS a threaded nut...

I don't think there is any way to tighten or repair leak other then by replacing grommet. sorry I'm not much help but coleman powermate is no longer in business and I have had no sucess in finding a source for parts for you.Thank you and good luck.

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I have a coleman powermate pulse 1800ex generator. It stutters when put in the run position. when in the choke position it doesnt stutter.

your main jet is plugged shut off fuel, remove bowl from carb(bottom of bowl) clean out small holes on screw with stranded wire .2 holes on side on in middle. be sure to put fiber washer back between main jet and bowl and use fresh gas jor

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This overflow can be caused by:

1. The float sticking

2. Gas inside of the float air chambers

3. The needle and seat have debris in them or a r damaged.

It is not a difficult fix but it does mandate removal of the carburetor float bowl.

You could probably do this yourself. It is much easier if you place the generator on a high work area so you can see the float and needle once you have the float bowl removed. Just make sure you do not drop the float assy so far that the needle comes out of the seat unless you have to remove the hinge pin SCREW for the float to clear the debris near the needles' pointed rubber head.

Thanks for using FixYa


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I had the exact same problem. There a few things you need to do first.
1) Make sure the fuel line knob is turned to the Open position; this knob is located under the gas tank.
2) Turn the power switch to on : it is a little red switch located near the pull-handle on the front of the generator. It needs to be on 'I' not on 'O'
3) Turn the choke lever on: it is a little steel lever with an arrow at the tip. Move the lever in the direction the arrow is pointing.
4) Make sure you have gas left in the tank: it may have evaporated or gummed up if you did mix in a fuel stabilizer before putting it away for storage.

If none of these things work , then you carburator may be full of water and gas lines gummed up.
These Gens need to be started up at least once a month to make sure they keep working properly.


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After checking all connections check for power from the end of the alternator. if there is no power it is either the diodes in the end of the alternators rotor or the capacitor has blown ( round barrel shaped device with four prongs on ) When changing capacitor make sure you get the correct size mesured in micro farads.

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