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A brand new saw that won't start is very unusual. Are you sure it doesn't have a fuel shutoff or something? Doubt it, mine doesn't, but maybe. I'd take it back to where you bought it and tell them WTF?
Failing that, small engine troubleshooting is pretty straightforward. It needs 3 things to run, air, fuel, and spark. Rule out air by taking off the air filter. If it will start without the air filter then the filter is plugged. Second give it a tiny shot of starting fluid directly into the carburetor. If it won't fire on the starting fluid then it's probably a problem with spark. If it will run for a second and die with the starting fluid then you're not getting fuel into the engine. Check the fuel shut off and the fuel tank and then go to ungunking the carb/fuel line/fuel filter. None of this should be an issue on a brand new saw though.
Failing that, small engine troubleshooting is pretty straightforward. It needs 3 things to run, air, fuel, and spark. Rule out air by taking off the air filter. If it will start without the air filter then the filter is plugged. Second give it a tiny shot of starting fluid directly into the carburetor. If it won't fire on the starting fluid then it's probably a problem with spark. If it will run for a second and die with the starting fluid then you're not getting fuel into the engine. Check the fuel shut off and the fuel tank and then go to ungunking the carb/fuel line/fuel filter. None of this should be an issue on a brand new saw though.
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