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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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Posted on Jan 02, 2017

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Husqvarna 445, starts runs and dies. as if it was a fuel problem.


You seem to have changed everything, are you sure this is not an ignition unit issue? i have to confess the unit is not the best quality, i think the next move is to replace it.

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Set choke to full on. To do this depress throttle all the way down and set choke lever to on. Pull starter rapidly until saw fires . Once it has fired set to start and pull starter cord until it starts. If it doesn't start in ten - twelve pulls,reset choke for two or three pulls,then switch back to start. Pull starter cord until it starts. When it starts it wii be at full R.P.Ms. Let run for twenty to thirty seconds. then move switch to run. Hope his helps, Thanks

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Model 445 chainsaw. Was cutting all day and no problem. Good gasoline, Husqvarna 2 cycle oil. All of a sudden started racing like the carb was stuck full open even when throttle trigger released. Then...


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Brand new husqvarna 445, won't start


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.

Jim

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1 Answer

Husky 455 dies out at full throttle or under load


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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Husqvarna 51 chainsaw will barely run, magnito and carberator ok


Probably need to re-adjust the carburetor jets. They are very small screws in the base of the carburetor. They will be labeled with an "H" and an "L" . Set the low speed first by turning it in slowly until the rpm drops slightly then start turning it outward untill the engine idles smoothly. At that point you can also adjust idle speed. Then you need to be careful here but you need to hold the throttle wide open at the same time adjusting the high speed jet. Turn it in until the rpm drops then slowly turn it out. The rpm will keep increasing. Once you get to a point where it is max'ed out then screw the jet back in one half a turn. Changes in altitude like using your chainsaw in town versus going to the mountains for firewood can sometimes make it necessary to adjust the fuel/air ratio.

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