Porting a Stihl ms260

[Esa03FI]

So, i would like to get some advice for porting my loved ms260. Great saw! Done a muffler mod, but it needs a bit of a waking up. (You know what i mean)

 

[bayard]

file down the keyway,.030 and advance the timing.tune the carb and try it out. then do a thinner head gasket , .020 - .025 piston clearance. tune it again. if that is not enough, get the grinders out and get to work.

 

[Wood Doctor]

You could just leave it alone. A lot of guys try to hop up good saws and end up messing them up. But, I guess it's fun trying to squeeze more juice out of an orange or more flavor out of a creamsicle.

 

[blsnelling]

I'd go .016"-.018" for the squish on that small of a saw.

 

[pioneerguy600]

I'd go .016"-.018" for the squish on that small of a saw.

I have many of them out there running with .015 to .017 squish and these saws earn their keep, all the ports have been modified as well with no issues as to longevity.

 

[Esa03FI]

Thank you for the help you gave! i'll probably stick with the muff mod...

 

[pioneerguy600]

I have not had the opportunity to run fuel from the other side of the big pond so their would be differences in port work that would need to be considered before giving detailed instructions on port shapes and timing numbers along with compression targets. Brad has ported saws for down under(Australia), not sure if he found and significant differences with their fuel or not.

 

[blsnelling]

I have not had the opportunity to run fuel from the other side of the big pond so their would be differences in port work that would need to be considered before giving detailed instructions on port shapes and timing numbers along with compression targets. Brad has ported saws for down under(Australia), not sure if he found and significant differences with their fuel or not.

There have never been any fuel issues with saws I sent to Australia.