Author Topic: stihl 661  (Read 1519 times)

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Offline EHP

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Re: stihl 661
« Reply #80 on: February 16, 2015, 05:58:54 pm »
Thanks Kevin, one thing with the 661 if your doing a video is make at least a couple cookie cuts then do your video , the 661 will run rich until it leans itself out
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Offline 660magnum

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Re: stihl 661
« Reply #81 on: February 16, 2015, 09:44:43 pm »
Got to get some heat into it for it to be in true running mode?
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Offline EHP

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Re: stihl 661
« Reply #82 on: February 16, 2015, 10:11:55 pm »
I find my 661 takes up to 5 or so cuts before its sets itself proper , the video I did of my 661 is all that saw has in it , that was a new chain but I filed it to make it cut a faster time and cut the rackers as well to help its time , If I had just ran the new stihl chain the time was 21 sec.
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Offline Cut4fun

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Re: stihl 661
« Reply #83 on: March 31, 2021, 11:39:48 am »
Saving from CRG today.  =  The early plate saws would pull the plating off during the first 20 hours as they broke in a Gilardoni cylinder. They started coating the pistons in Tin to help with scuffing from SN:181912016 during break in. They switched to the casting plant in Brazil in 2017 , those cylinders have STIHL BR on them and have a different port geometry to keep from pulling the rings off the piston.

 186691003 is the cut off between Gilardoni and BR. You could still pull plating after break in. That cylinder also looks like it may be a dud. The transfers are awfully sharp too. Do you have any bluing around the rod bearing ? You can start to get rod failure and pull plating also. That's not a cylinder that inspires confidence.

 I'd be interested to see how many hours it truly had. I know from 184316xxx back they had a two piece crank and changed to a three piece crank that helped keep rod failure down. Good luck on a cylinder I've been on backorder for 1 month with 3 of them.
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