Check out my squish!

Arborist Forum

Help Support Arborist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
z71mike

z71mike

Addicted to ArboristSite
Joined
Apr 8, 2010
Messages
3,324
Location
NJ
I got an 026 a/m kit cut down to .012 and it still is only blowing 150psi with no balls. I got a bad kit. Last time I buy from my local shop.
 
bucknfeller

bucknfeller

Opportunistic Hooligan
Joined
Nov 8, 2012
Messages
1,111
Location
Maryland
Ok I'll pull the bottom gasket out. What type of sealer should I use in its place ? Any gasket paste or are there ones we should steer clear of ?

Has to be resistant to gasoline. Threebond 1194 is commonly available around here. Yamabond 4, and Hondabond are the same stuff, Loctite 518 works good too. Dirko is what Stihl recommends, and your dealer can order it for you if they don't stock it.
 
z71mike

z71mike

Addicted to ArboristSite
Joined
Apr 8, 2010
Messages
3,324
Location
NJ
compression is pretty low, detonation shouldn't be a problem....as long as the hard parts to hit....:confused2:

Yeah i kinda hit a wall when the compression numbers were coming out so low. Strange.

At first bolt-up with a gasket, uncut, it was down around 100psi. First words: "Oh no"
 
z71mike

z71mike

Addicted to ArboristSite
Joined
Apr 8, 2010
Messages
3,324
Location
NJ
I have thoroughly trashed wild thing that pumps more than that, and it won't even pop. Are you sure your gage is relatively accurate?

Good question. With the lackluster performance of the saw, I assumed my gauge wasn't on the fritz. But it's worth a check anyway.
 
nmurph

nmurph

ArboristSite.com Sponsor
Joined
Nov 26, 2007
Messages
16,162
Location
Somewhere in the space-time continuum
The problems with squishes below .014-.015" is are that -

the piston and cylinder expand and grow as they heat up and physically hit each other as the piston rocks in the bore.

the fuel charge is squeezed out of the squish area where it acts as a coolant to the piston crown.


Matt, you need to reorient your solder by 45°. Two pieces should be along the axis of the wrist pin and the other two should be at the exhaust and intake ports.
 
old-cat

old-cat

Fir Man
Joined
Aug 18, 2012
Messages
3,752
Location
Near Mt. St. Helens
The problems with squishes below .014-.015" is are that -

the piston and cylinder expand and grow as they heat up and physically hit each other as the piston rocks in the bore.

the fuel charge is squeezed out of the squish area where it acts as a coolant to the piston crown.

Another member here said he has a Husky with .010" squish that he has been running for years. Could that be mis-measurement? Or bs?
 

Latest posts

Top