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Shredder will run only if you feed gas to the carborator with a syringe. When the gas tank is on it won't run. When the tank is off gas flows free from the hose. Why won't it run with the gas tank on? I don't know why if everything is flowing, why it won't run when it is put together.

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Hate to say this but it sounds as if your carb needs cleaning as the fuel flow is being restricted at the un-choked position. Before you have to take the carb apart, try this. Go to Walmart, or Northern Tools and buy a can of "SEAFOAM" which is a fuel additive that cleans carb jets and passages, and may over time unclog your jets. Other cleaners on the market work so if you can't find SEAFOAM, then use another. Siphon all of the old fuel out of your tank into a plastic jug, put fresh fuel into your tank.Pour twice the amount recommended in to your tank, and start the machine with the choke on and let it get the fuel mixture running into the carb. Run it as long as possible and when it dies out, let it sit for a full day and night. Try it again and repeat the running process.

The fuel that you use is 10% ethanol and alcohol is very hydroscopic and sucks in water and combines it with the gasoline. This water latches on to dirt and grime, and junk and eventually clogs the jets. If you let the gasoline with the ethanol sit in your tank unused for more than three months, it becomes jelly like. That is why it is a prudent measure to run all of the gasoline out of your machine before it sits for anytime longer than 3 months. Some wag said that the government mandate to add 10% ethanol to gasoline was just a full employment contract for engine repairmen. If you plan on leaving gasoline in small engines for a period of time you need to add some "Stabil" to it to prevent jelling of the gasoline.

Posted on Dec 30, 2010


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