Stihl 044 runs full speed only

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bwestbrook

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• Jan 25, 2012 / Stihl 044 runs full speed only

• #1

I have a 044 that starts and runs great but only full speed. When I press the trigger it will throttle down not bog down. If I try to let it idle it runs full speed for about 15 seconds and dies. I have tried adjusting the high and low idle with no change. I installed a carb kit and cleaned with carb cleaner and compressed air.
What would make this thing run full speed all of the time?

 

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KennyV

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• Jan 26, 2012 / Stihl 044 runs full speed only

• #2

Check your linkage at the carb... something is not connected...:smile:KennyV

 

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bwestbrook

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• Jan 26, 2012 / Stihl 044 runs full speed only

• #3

Kenny I thought the same thing too. But the throttle linkage is connected and works appropriately and so does the choke.

 

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ILENGINE

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• Jan 26, 2012 / Stihl 044 runs full speed only

• #4

The rubber intake boot between the carb and cylinder may have a crack in it causing it to run lean and over speed without throttle control.

 

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bwestbrook

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• Jan 26, 2012 / Stihl 044 runs full speed only

• #5

I sprayed carb cleaner to try and find any leaks but no luck.

 

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wardsmower

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• Feb 10, 2012 / Stihl 044 runs full speed only

• #6

Check your fuel lines and fuel filter. Fuel lines could be pinched, or colapsed. Sounds simple but it does happen.

 

temarthers

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• Feb 10, 2012 / Stihl 044 runs full speed only

• #7

Not sure about a stihl but if something happend when the low and high speed needles were adjusted this could be the cause. If someone screwed those babies in ALL the way and force them in good, then it may have damaged them. Not sure if you can get the needles out on Stihl or not, but is worth a look and did you take out the Wealch Plugs, normally you don't have to but definitely sounds like a carb problem and inside the carb at that. See if the needles will come out and see if they have been damaged.

 

Joe79

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• Feb 12, 2012 / Stihl 044 runs full speed only

• #8

Def a carb problem. If you've tried all the obvious adjustments with no success then there are a couple of things you could look at.

Could be a needle stuck open in the carb that maybe you didnt check during cleaning, allowing constant gas flow.

Try looking at the little spring that's wound on the linkage of the carb throttle. Sometimes that little spring either breaks, or comes detached and unwinds. The spring doesn't retract allowing the throttle to stay open.

Let me know if that helps!

 

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bwestbrook

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• Mar 22, 2012 / Stihl 044 runs full speed only

• #9

Well I done a crankcase pressure/vac test and found the crank seal behind the clutch leaking. When I took the seal out it was dry rotted.