Question about Coleman Sport 1850 Generator

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I have a Coleman generator 1850 pulse and it runs ok for a little

I have a Coleman generator 1850 pulse and it runs fine for about ten minutes. Then I start seeing air bubbles in the fuel line and then it starts missing. After that it dies because there is no fuel in the line. Then about a minute or so the line fills up with gas then it will start again. I have cleaned the carb about 5 times now and it keeps doing the same thing. Any ideas? TIA

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Gravity feed fuel systems are the most simple and reliable way to deliver fuel to the engine, however suffer from a couple of problems.. As the engine heats up fuel tends to be pushed out of the carb back into the fuel tank and if the vent in the gas cap is not working properly fuel lock (or a slight vacuum in the tank) will prevent fuel from entering the carb. There should be a plastic block or manafold seperating the carb from the engine to keep the carb from overheating. Some engines have this block bolted to the engine, then the carb bolted to block., others have two bolts thru the carb and block to engine. In ether case make sure parts are held tightly together so no vacuum leaks thru gaskets.. One should make sure that the gas cap is venting. Sometimes fuel sloshing in the tank will clog the vent-hole in the cap. Try running the generator with the cap loose to see if this helps.. Replace fuel cap as needed if vent is clogged. Good luck with your generator.

Posted on Jul 30, 2010

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