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Author Topic: Stihl MS440  (Read 1574 times)

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Offline man of stihl

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Stihl MS440
« on: June 19, 2011, 10:19:17 am »
I finally got a 440! i am very excited about getting this one running. It has a scored piston and the rings are stuck.
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Offline man of stihl

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Re: Stihl MS440
« Reply #1 on: July 09, 2011, 10:38:07 am »
Ok. I woods ported my 440 and it runs very well. There was much material to be taken off the ports. I have run into one problem though. When I adjust the carb to 4 stroke at WOT. I start to cut and seems its not getting enough fuel. it still screams, but too lean for work. When i richen it way up, it kinda loads up but will clean up in the cut again. ???The fuel filter is clean so its not that. Some people put larger carbs on there ported saws. I was wondering if that was the problem? I will put a vid on youtube later. Any ideas?
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Offline Cut4fun .

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Re: Stihl MS440
« Reply #2 on: July 09, 2011, 11:20:57 am »
WAG = Have you checked tank vent.  New carb kit, checked fulcrum height.
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Offline Al Smith

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Re: Stihl MS440
« Reply #3 on: July 09, 2011, 11:35:25 am »
My guess either the fuel lever shut off  is set too low or the diaphragm has lost some of it's elasticity .That thing has enough carb you won't "over run it "
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Offline man of stihl

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Re: Stihl MS440
« Reply #4 on: July 09, 2011, 11:36:05 am »
I did clean the carb, adjusted the fulcrom height to allow more gas in. But did not check the vent. 
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Offline man of stihl

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Re: Stihl MS440
« Reply #5 on: July 09, 2011, 11:38:48 am »
Maybe i will order a carb kit.
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Offline Al Smith

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Re: Stihl MS440
« Reply #6 on: July 09, 2011, 11:40:52 am »
Let me add a thought .I've got several souped up saws and at times they can be real fuss budgets .Two in praticular ,038 Mag ,Ms 200T at certain times only takes just a teeny little bit on the high speed between running good and running great .

You never know ,they have a mind of thier own at times .
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Offline Al Smith

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Re: Stihl MS440
« Reply #7 on: July 09, 2011, 11:43:50 am »
I just caught that part about cleaning the carb .Been down that road and sometimes you win ,sometimes not .More times than not if the saw has sat for a while not running you'd just as well rebuild the carb .
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Offline Cut4fun

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Re: Stihl MS440
« Reply #8 on: July 09, 2011, 12:03:50 pm »
What carb. I might have a HD HDA complete kit here.  Unless you have easy access to kits up your way. I always order in bulk from out of state.

OFF ebay = STIHL WALBRO CARB KIT FOR THESE SAWS LISTED: 029, 039, MS290, MS310, MS390, 044, 046, MS440, MS460, MS441.  WALBRO HD CARBURETOR.
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Offline man of stihl

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Re: Stihl MS440
« Reply #9 on: July 10, 2011, 07:50:30 pm »
I think i have it running good now. Just like Al said, the carb adjustments are very touchy. http://www.youtube.com/watch?v=5u6m23Kl-Gs
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