Author Topic: Squish, is enough too much? (Read 240 times)

KilliansRedLeo · « **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?

winland · « **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

KilliansRedLeo · « **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.

adam32 · « **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...

winland · « **Reply #4 on:** January 13, 2014, 10:03:48 am »

Awesome, thank you.

Chuck

Quote from: KilliansRedLeo 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.

KilliansRedLeo · « **Reply #5 on:** January 13, 2014, 11:58:47 am »

Quote from: winland on January 13, 2014, 10:03:48 am

Awesome, thank you.

Chuck

Quote from: KilliansRedLeo 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.

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.

Cut4fun . · « **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?

KilliansRedLeo · « **Reply #7 on:** January 13, 2014, 03:18:34 pm »

Saw was a Stihl 038Mag

adam32 · « **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.

3000 FPS · « **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.

Chainsaw Repair

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Author Topic: Squish, is enough too much? (Read 240 times)

KilliansRedLeo

Squish, is enough too much?

winland

Re: Squish, is enough too much?

KilliansRedLeo

Re: Squish, is enough too much?

adam32

Re: Squish, is enough too much?

winland

Re: Squish, is enough too much?

KilliansRedLeo

Re: Squish, is enough too much?

Cut4fun .

Re: Squish, is enough too much?

KilliansRedLeo

Re: Squish, is enough too much?

adam32

Re: Squish, is enough too much?

3000 FPS

Re: Squish, is enough too much?

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