Coleman Powermate 5000 Generator won't start


Old 10-29-12, 12:30 PM
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Coleman Powermate 5000 Generator won't start

I have a Coleman Powermate 5000 that I purchased in 2001.

It won't start.

The rope turns the flywheel and I get a backfire.

It has fresh gas, which is making it to the carb, a new spark plug, cleaned carburator.

What am I missing or doing wrong?
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Old 10-29-12, 01:18 PM
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You did not say how you cleaned the carburetor. If you did not remove it from the engine and disassemble it, I would do so. Just spraying cleaner at it or down the throat will not do much. You have to clean all the tiny orifices, passages and jets.
Old 10-29-12, 01:24 PM
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I removed the carb and cleaned the entire thing.
Old 10-29-12, 01:41 PM
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Try removing the plug, adding a tiny bit of gas in the cylender head and replace the plug. Should fire and hopefully draw the fuel from the carb.
I think these have a fuel shut off, is it open? I own the exact same model, but can't remember if it has a shutoff.
Old 10-30-12, 07:54 AM
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It does have a fuel shutoff but it is open. I checked the flow when I pulled the carb.

I pulled the plug and added gas with the same result, no start.

The strange thing is that it backfires.

So, it looks like it's getting fuel and a spark.
Old 10-30-12, 11:24 AM
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Does the engine have compression? The backfire indicates a valve open at the time of firing. Could be a stuck valve or an ignition timing problem (possibly flywheel key).
Old 10-31-12, 09:36 PM
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I had one of those, does it have the Subaru/Robin engine?

If so, the valvetrain is chain driven and very easy to access. Pull the valve cover and observe the timing marks.

I am with the big Cheese on this one....could you have sprayed into the intake and knocked a piece of crud under a valve?

Backfire is either from the intake valve stuck open or timing is off......both holding the valve open slightly.

Page 23 shows the timing....providing you have the Subaru/Robin engine.

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