Preliminary Squish Measurements

[Agrarian]

Those who like to modify the squish suggest measuring the squish prior to the disassembly. This confuses me because most of the saws I tear down have 0.010 to 0.020" of accumulated carbon deposits around the top. So once you clean this up when rebuilding, how does the initial measurements help you?

 

[Warped5]

Well ...

It sounds counter-productive to me.

If you measure prior to disassembly: You then increase that number by cleaning out the carbon build-up. That number is then decreased (by how much?) when you remove the crap stuck to the bottom of the cylinder and on the case; the stuff you don't measure.

Makes no sense to me either.

 

[blsnelling]

On a used saw, you're exactly right. You must clean up the piston crown and combustion chamber, reassemble, and then measure.

 

[Agrarian]

Ahhhhh, only for new saws! That makes more sense. Someday I'm going to get me one of those new saws rather than the carcasses I can afford! But I don't think I will tear it apart unless I have to.