Husky 371xp 135psi-squish is too wide-what to do

Arborist Forum

Help Support Arborist Forum:

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

eriklane

ArboristSite Operative
Joined
Sep 13, 2007
Messages
362
Reaction score
86
Location
Rockford, MI
Took the base gasket out to get .044...it's worse with base gasket in...only thing I can do is have the base milled, correct?

With the base gasket in it was about .060...and 135psi...
 
Think we need some more details.
Is this OEM parts? Aftermarket piston and cylinder? Did you just rebuild it?
 
Used ring also?
Did you check the ring end gap?

I think he's thinking his issue is the large squish measurement.
I don't know what those saws typically had for squish. I do know however, the 371\372 weren't particularly high compression engines to begin with. Both of mine are around 150.
But used piston+ring could be the culprit for low compression.
 
Ok well back to your original question, milling the base is not the only thing you can do, you could do a popup piston as well.
 
If it was mine I'd mill the base down and keep the piston as is. If uou really want more compression then you can have the chamber cut also.
 
I had a j red 2171 a while back that the previous owner had just rebuilt with a AM p\c. Saw ran ok, not great, but ok.
After 6 tanks it was only blowing 130 psi. A squish check showed .066 with base gasket in. I dropped the gasket, got the squish down to .045 and the comp went to 150 psi. Ran much better after that!
 

Latest posts

Back
Top