Author Topic: Squish, is enough too much?  (Read 222 times)

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Offline KilliansRedLeo

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Squish, is enough too much?
« on: January 13, 2014, 08:04:44 am »
OK, might as well get some thoughts on this. In my experience stock saws can have any where between 0.030 and 0.050 squish. When building I shoot for 0.020 or as close as I can get without going below 0.020.

I got a saw in Thursday last that was built a few years ago by an out of state builder, it had 0.018 squish, ran pretty well. Not my saw, I was asked to put new seals in it because the owner thought it had an air leak, it did.

Anyway I was wondering if anyone had opinions on what would be a good rule of thumb for minimal squish?
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
1743-1826

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Offline winland

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Re: Squish, is enough too much?
« Reply #1 on: January 13, 2014, 09:36:34 am »
OK, this forum is "How To Basics" so this non-engine building, non-mechanic will ask...

What is a Squish?
Can you describe it, show me a picture of it, and why is it important to saw builders, but not so much to the saw manufacturers?

Thanks for teaching.

Chuck
 

Offline KilliansRedLeo

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Re: Squish, is enough too much?
« Reply #2 on: January 13, 2014, 09:42:21 am »
Go here download parts VIII and VIIII

http://chainsawrepair.createaforum.com/tutorials/conversion-of-a-husqvarna-261-to-262xp-with-muffler-mod-and-other-mofifications/

Squish is the clearance between the piston crown and the top of the cylinder.
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
1743-1826

Offline adam32

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Re: Squish, is enough too much?
« Reply #3 on: January 13, 2014, 09:59:52 am »
.001 will run good...

.100 will run okay...

.015 on small saws works great...

.020-.030 on work saws...

Offline winland

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Re: Squish, is enough too much?
« Reply #4 on: January 13, 2014, 10:03:48 am »
Awesome, thank you.

Chuck


Go here download parts VIII and VIIII

http://chainsawrepair.createaforum.com/tutorials/conversion-of-a-husqvarna-261-to-262xp-with-muffler-mod-and-other-mofifications/

Squish is the clearance between the piston crown and the top of the cylinder.

Offline KilliansRedLeo

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Re: Squish, is enough too much?
« Reply #5 on: January 13, 2014, 11:58:47 am »
Awesome, thank you.

Chuck


Go here download parts VIII and VIIII

http://chainsawrepair.createaforum.com/tutorials/conversion-of-a-husqvarna-261-to-262xp-with-muffler-mod-and-other-mofifications/

Squish is the clearance between the piston crown and the top of the cylinder.

No problem, that is what we are all here for to help and learn. You might want to have a look at the other sections as they cover the top end rebuild and modification of a saw. You are the perfect person to give feedback! The tutorial is not quite finished but when done it should take a person through the entire process step by step. If you think things are not detailed or clear enough post a message or PM me.
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
1743-1826

Offline Cut4fun .

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Re: Squish, is enough too much?
« Reply #6 on: January 13, 2014, 03:10:47 pm »
I've heard of some porters using .018 that are pushing it for every last dime and worked fine for them.  Most I seen on mine  were .020-.022   

What saw?
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Offline KilliansRedLeo

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Re: Squish, is enough too much?
« Reply #7 on: January 13, 2014, 03:18:34 pm »
Saw was a Stihl 038Mag
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
1743-1826

Offline adam32

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Re: Squish, is enough too much?
« Reply #8 on: January 13, 2014, 04:07:37 pm »
I had an 084 that was .110...it ran ok. I got it down to .020 and it runs better but also a lot harder to start.

Offline 3000 FPS

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Re: Squish, is enough too much?
« Reply #9 on: January 14, 2014, 08:20:40 pm »
I usually shoot for .020 myself but I do have a Poulan 335 that I took down to .018 and it ran just fine with no problems.
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