Coleman Powermate Powermate 5000W Generator Logo

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Michael Allen Posted on Aug 12, 2017
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My Coleman generator runs great for about 3-5 minutes then shuts down.

It acts like the fuel has been shut off. When I looked in the tank I could see where the valve comes into the tank and it looked like a piece of cardboard rolled up and stuck down in it. Is that suppose to be or is it some sort of blockage? There doesn't seem to be any type of screen there either. There is an inline filter which I just replaced to try and solve the problem. Thanks Mike

1 Answer

Chuck Graybill

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  • Posted on Sep 23, 2017
Chuck Graybill
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I am guessing this is caused by some type of floating debris in your tank. I think that unit might just have a simple grommet holding the outlet fitting into the bottom of the tank. Try removing the outlet fitting and try to make sure the tank and fitting are free from debris.

5 Related Answers

sal_kh_sab

sal sabea

  • 98 Answers
  • Posted on Oct 16, 2009

SOURCE: Need to replace fuel shut-off valve

well..the whole valve has a place where u can place a 12 or 13 size spanner...and then just twist it..

don't hesitate to write to me for further information:
[email protected]

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THENTHEREWER

Terry Rodgers Jr.

  • 131 Answers
  • Posted on Jan 07, 2010

SOURCE: I bought a used coleman powermate 5000 generator,

What brand of engine & horsepower is it?Also about how long was it stored or last time it was run? The reason I ask is if it was stored with gas in it & a fuel stabilizer wasn't added to it,your primary jet is plugged in the carburetor(reason it will only run while choked).

kel1guy2002

Kelly

  • 3740 Answers
  • Posted on Mar 22, 2010

SOURCE: Colman Powermate Generator will not stay running

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

Kelly

Anonymous

  • 2 Answers
  • Posted on May 18, 2010

SOURCE: Coleman Powermate 10 HP Generator shuts down after a few minutes.

I have an HM100 on a 5500 watt gen with the same problem. This motor calls for a J17 spark plug, but I found using a J19 (hotter) plug solved the problem. I think the J17 doesn't get hot enough for a complete combustion burn so it act like fuel starvation thus resulting in the black sooty and wet plug.

H2_Brad

Brad

  • 425 Answers
  • Posted on Jul 16, 2011

SOURCE: Where do you buy the

Take the old valve, called a petcock, to a local lawn mower repair shop and they should be able to help you.

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This sounds likely a badly routed fuel line that is getting hot and causing airlocks. The fuel delivery is slow, the gas heats up and vaporizes causing an air lock. You can test by removing the fuel line and with no engine running, run the contents of the fuel tank into a container. Do you have good fuel flow?

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look for a restriction in the fuel line (input to carb as well), also check oil level.

If those are good, then remove the carburetor bowl (dont damage gasket), and dump out anything that is in there. Your float may be sticking, or the needle seat has trash in it.
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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.
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