Author Topic: Stihl Piston/Cylinder Kits  (Read 3145 times)

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Offline Cut4fun

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Re: Stihl Piston/Cylinder Kits
« Reply #30 on: January 04, 2013, 01:53:28 pm »
That cylinder on your 660mag has one of those D shaped combustion chambers I was told were the better ones to look for.  I have no clue why but builders like them when porting.

Offline 660magnum

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Re: Stihl Piston/Cylinder Kits
« Reply #31 on: January 04, 2013, 03:44:23 pm »
Yes, this  026 PRO will really turn up the rpm and has a 3/8" X .050" X 16" Stihl bar X 7 tooth rim sprocket. It is ported and has a Walbro WT-194 carb with the intellicarb device disconnected. It also came with a adjustable oiler that only works when the chain is moving whereas some regular (None Pro) 026's didn't have an adjustable oiler and their oil pump ran the whole time the engine was running.

It is a great limbing chainsaw and companion to my 660 MAG. I have the 026 backed up with a four port 025.
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Offline davbell22602

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Re: Stihl Piston/Cylinder Kits
« Reply #32 on: February 06, 2013, 09:26:43 am »
How much play can the piston needle bearing have?

Offline 660magnum

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Re: Stihl Piston/Cylinder Kits
« Reply #33 on: February 06, 2013, 09:31:22 am »
If you feel any UP-DOWN play, it is not acceptable.
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Offline davbell22602

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Re: Stihl Piston/Cylinder Kits
« Reply #34 on: February 06, 2013, 09:39:24 am »
I have no up and down play but have front to back play when wiggling the pin. Its little though.

Offline brokenbudget

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Re: Stihl Piston/Cylinder Kits
« Reply #35 on: February 06, 2013, 11:50:02 am »
there should be ZERO (radial) play on either the big end or little end of the crank. if there is, you need to fix that before it decides to turn the crank case into a gravel pit.
when I grow up, i wanna be an adult.

Offline davbell22602

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Re: Stihl Piston/Cylinder Kits
« Reply #36 on: February 06, 2013, 12:25:42 pm »
So front and back play isnt acceptable either?

Offline 660magnum

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Re: Stihl Piston/Cylinder Kits
« Reply #37 on: February 06, 2013, 12:29:49 pm »
that is correct.
The only play might be side to side.
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Offline davbell22602

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Re: Stihl Piston/Cylinder Kits
« Reply #38 on: February 06, 2013, 01:02:48 pm »
Well the play have is front to back of the saw when the piston pin is in the bearing on the rod. But its very little like not even a 1/16th at most.

Offline brokenbudget

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Re: Stihl Piston/Cylinder Kits
« Reply #39 on: February 06, 2013, 02:18:44 pm »
Well the play have is front to back of the saw when the piston pin is in the bearing on the rod. But its very little like not even a 1/16th at most.

there should be ZERO (radial) play on either the big end or little end of the crank. if there is, you need to fix that before it decides to turn the crank case into a gravel pit.
when I grow up, i wanna be an adult.

 

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