Husky 42 or 242xp piston dimensions please

[wicklamulla]

Hi i was wondering if anyone has a loose piston or a stripped old saw and cud measure the piston dimensions for me as this old saw i was given has silly compression and Wisecobandit and me reckon the incorrect piston may have been fitted at some point. it's the correct bore size but we are wondering if it's a bit too tall/long maybe ? It's a flat topped piston thats fitted. Tanks in advance folks

[Dinosaw]

Hi Wicka, think I've got one in my old pistons box. I'll have a look and get back.

[Dinosaw]

strangely enough it's 42mm.

[Dinosaw]

Sorry, dozy moment! I didn't read your post properly. Silly question but is the comp. ridiculously high or low? May be the gudgeon pin hole is further away or nearer the top of the piston than standard.

[wyk]

What is the compression? Small saws can often run up to 225psi or so without detonation on quality fuel.

[wicklamulla]

Thanks lads. The compression has not bin measured but it's very high in our opinion. The piston does not strike the spark plug afore anyone asks !

[spudulike]

Thanks lads. The compression has not bin measured but it's very high in our opinion. The piston does not strike the spark plug afore anyone asks !

 

It never will unless the wrong one is fitted, it will hit the squish band first!

[wicklamulla]

It never will unless the wrong one is fitted, it will hit the squish band first!

 

true. Oil update this thread as i learn more