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Once engine gets to operating temp it cuts out ,i've checked fuel ,aircleaner & spark plug ,all ok?

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This is most likely a carburetor problem. Over time fuel can cause a build up of varnish on the inner parts of the carburetor and the jets. This will cause the engine not to run correctly. Most likely the engine is running lean due to incorrect fuel mixture because of build up.

If you have ever left gas in the unit, without a stabilizer additive for a long period of time that could have caused the problem.

Today's gas breaks down quickly. In as little as 2 weeks, the gas is already breaking down. The ethanol they add to gas now draws in moisture, and moisture is bad for gas. It speeds up the breaking down of gas and causes varnish to occur.

You can try running a carburetor cleaner in the gas. You may have some success. You can also try a carb cleaner.

If you are good at working on machinery, you could pull the carb apart and clean out the jets.

As well you can take it to a shop for repair. Most shops will not clean and rebuild carbs as because of man hours it is cheaper to replace the carb instead.

Depending on the size of the engine, the new carb could run you anywhere from $90 to $160 for one.

Posted on Sep 09, 2010


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Have you checked spark plugs? I always check the "BIG" three when diagnosing any engine. Compression, spark, and fuel. I recommend buying a compression tester and a spark tester. Check both of those, if ok then make sure your still getting fuel to the carb. If so, try a shot of starting fluid through the aircleaner, if it starts on starting fluid then dies, you have a dirty carb. I would first of all replace plugs and give this unit a tune up. Good luck and happy wrenching!

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