555, ported, pop top, thinner base gasket, muffler mod

[Charlie Pendleton]

Liking this saw very much, but I still want a 372 .

 

[huskyhansen]

What was your squish at before deleting your base gasket?

 

[Charlie Pendleton]

What was your squish at before deleting your base gasket?

Been a while but I believe around 41 thousandths

 

[huskyhansen]

Had a hard time getting my measurement on this saw. Seems to be around 18-20. I don't remember my 365 being this difficult.

 

[Charlie Pendleton]

Had a hard time getting my measurement on this saw. Seems to be around 18-20. I don't remember my 365 being this difficult.

Tp change the squish I had to machine around 20 thousandths off the outside top lip of the piston.
You have the regular squish band in the cylinder and then a second ring about 1/32 wide. When I first checked squish with the thinner base gasket I had 21 thousandths on the main ring squish band and only .006 on the second.

 

[huskyhansen]

So deleting the base gasket i could be in serious trtouble?

 

[huskyhansen]

I measured the smallest part of the solder.

 

[Charlie Pendleton]

I measured the smallest part of the solder.

I would think so. Look real close in your cylinder, there's a chance you have a different year and manufacturer of the cylinder who knows it may not have the second ring like mine. I had to make if I remember right a .005 thick gasket

 

[huskyhansen]

I'll mess with it again tonight. I dont think i had another lip because I could see on the solder where is was hanging over edge of piston. So i know if there was one i would be able to see it. I'l do It again and post up some pics. I appreciate the help.

 

[Charlie Pendleton]

I wish this was a pic after being cleaned up but if you look you can see the double ring.

 

[Charlie Pendleton]

 

[huskyhansen]

 

[huskyhansen]

Yup looks to be the same. Dang. I wonder why that doesn' show up on the solder.

 

[Charlie Pendleton]

To me they look different, mine has 3 noticeable stair stepped rings yours appears to have 1
You may be just fine if your getting .018-.021 without a gasket. Yamma bond or comparable sealant should give you a couple thousandths extra clearance

 

[Charlie Pendleton]

unless that thin light color on the outside of yours is the ring im referring to

 

[Charlie Pendleton]

What happened on to cause the dents in your port?

 

[huskyhansen]

That is still a mystery but pretty sure someone used an inappropriate tool for a piston stop. I only paid 100 bucks for saw but pre owner said it only needed carb work. Liar. I got a steal either way.

 

[Charlie Pendleton]

That is still a mystery but pretty sure someone used an inappropriate tool for a piston stop. I only paid 100 bucks for saw but pre owner said it only needed carb work. Liar. I got a steal either way.

Can't go wrong for that price. Its one of my favorite saws. I cut big pine mostly so mine sports a 24 inch bar all the time but with a 16 or 18inch it sounds pissed off, fun little runner.

 

[huskyhansen]

I'm goona run a 16 I stole off my down 2159 for now. I got a ported 265xtorq for everything else. Can't wait to have some a little lighter to grab.

 

[Charlie Pendleton]

View attachment 633493 I'm goona run a 16 I stole off my down 2159 for now. I got a ported 265xtorq for everything else. Can't wait to have some a little lighter to grab.

You will love it