The function of pitch

[Magnus]

It has to do with the engines configuration, work it supposed to do and handlers knowledge and preferences.

 

Take the 254 for example.

It holds rpm pretty good with 3/8. Cuts perhaps better with it in the firewood pile, but not when limbing in forrest work.

1/4 and 3/8hobby is a bit weak chain and will not do saw justice.

.404 and larger is to good and is too demanding for this saw, both in power and rpm.

 

The 346 will not cut well with the 3/8 unless handler is very good running his saw.

It drops rpm too easy and run hotter.

.325 is best chain for this saw and it will fit the engine best in 95% of the jobs it will be exposed to.

 

Each pitch has its demands in rpm and power.

This is just the pitch.... Then there is tooth shape, pin number in rim/sprocket, semi skip/skip etc.

Lots of things to test and big gains can be done without touching engine.

 

This all is worthless if it isn't a sharp chain. No matter what pitch or engine it is if it can't cut!