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My husqvarna 445 starts and runs until full throttle then dies.

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Chanes are the carb needs to be adjusted and the diaphrams in the carb need to be replaced over time they get stiff and hard from old feul, causing it to not pump feul and meter the feul properly

Posted on May 16, 2009

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Try not giving any throttle when first starting. The newer trimmers are this way many times. (Maybe the newer chainsaws are this way now.)You prime the carburetor, set the choke and pull, but don't throttle until it runs for 10 or 15 seconds.

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Your carb may be the issue but your ignition coil could be the culprit. Once they start going bad, they can act up intermittently or give various symptoms from day to day. The fact that your saw dies at full load or under load, probably means that when your saw gets hot or requires more spark, your coil is not able to provide it. Your carb is easy enough to clean out, you can take it all apart and clean all screens, etc....

I just replaced my coil due to the exact same symptoms and now my saw runs great. $60 off ebay and you can put it on in 15 minutes yourself. Check your carb first though

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