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I have a coleman 5500 W generator with a 11HP Tecumseh OHM 90-110 engine. It starts up immediately, runs for 10 seconds, and quits. I have taken the carb apart and cleaned it, everything seems to be

There are no adjustment screws for air/gas mixture, just a idle adjustment setting.

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  • Russ Creange Nov 08, 2012

    The bowl is full, so gas is getting in to the carb. Spark is good. I didn't know about the low oil protection system, will check that today.

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Posted on Jan 02, 2017

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SOURCE: 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

Posted on Dec 16, 2008

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SOURCE: generator hard to start and backfiring

Sound like you've done things in the correct order, tecumseh's are notorious for carb problems if you let as sit in them. Backfiring is timing related (flywheel key) or valve problems. I would take a closer look at the exhaust valve I don't believe it is closing all the way.

Posted on Mar 16, 2009

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SOURCE: Generator with Briggs & Stratton,no gas is getting in carburetor

The needle valve may be stuck which would not let gas into the carb. I don;t think rebuild kits are too expensive. Pull the carb and take it to a lawnmower repair shop and they should have the parts. Before that though pull the bowl and make sure it has gas in it. If no then remove the fuel line and make sure gas flows from it. If no then could be the fuel shutoff valve is not operating properly or junk in the gas tank is obstructing the line.

Posted on Jul 31, 2009

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SOURCE: McCulloch 11HP FG6000MK surging

I just came across this post. Hopefully you have it solved. But for others who may run into this problem here is my advice. This model has a low oil sensing system. Over time the oil breaks down or gets contaminated. This can cause sympoms very akin to carb issues. I'd check this 1st as its the easiest fix. Drain and replace oil to the factory recommended specs. Make sure it is to the proper level. Your not finding any carb issues makes this almost a sure thing. DO NOT DISCONNECT or DISABLE the sensor or you defeat its purpose.

Posted on Jan 12, 2010

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SOURCE: I have a Coleman Powermate 5500 Generator. It is

This engine was not built with quiet in mind, it was built to be cheap. upgrading the exhaust is your best bet and likely the cheapest. Talk to a small engine shop about the possibility of using a muffler from an ATV.

Super Trap makes a fantastic muffler, if it will fit your application (most do). A link has been provided at the end. When you are looking at the various options, you will notice that a rating in db units. Reducing noise by 3db is half the original noise level.

if you can, go with the SuperTrapp. If still noisy (probably won't be), then add on the resonator as well. Downside to using aftermarket is that you will have an exhaust stack / system that sticks out the side of the generator. Upside is that you will be able to think quietly about how much the exhaust sticks out.

And no, I don't have any connection with Jack's, they are just the first hit that came up. Now that you know that something is available, you can do more research on it.

http://www.jackssmallengines.com/Quietmuf_index.html

Posted on Jun 12, 2010

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