XL-913M Odd Pistons!

[onlyhomelites]

I received my latest shipment from a dealer in the UK that I'm slowly buying out...had some L-shaped piston rings that didn't show up my database. So I started going through my newest international IPL's and hit pay dirt! The XL-913M is mostly like the other 900 series saws, but it used two different pistons. The A-67179-A used a single l-shaped ring, 2 1/16" bore. The A-68066 used a L-shaped ring on the BOTTOM landing and a 55537 ring on the top! Check out page 3 of the IPL, that is a crazy looking setup: www.leonschainsawpartsandrepair.com/uploads/3/9/7/9/39792537/homelite_xl-913m_chainsaw_ipl_24363.pdf

[stillsawing]

Wonder which one is the latter or the improved of the two 

[Deleted]

I wonder what the reason was?

[lesorubcheek]

That's a first! Never seen that before. I remember reading over at AS that the Dykes rings were phased out because of carbon buildup causing damage, so they only were used in the late 60s/early 70s. They'd be perfect today with modern synthetic oils. But to put a head-land ring below a regular ring?? Sure would be nice if someone could explain this one. Wouldn't have believed it if you hadn't shown us!

Dan

[sweepleader]

Here's another tidbit on Dykes rings: www.chainsawcollectors.se/phpbb3/viewtopic.php?t=520

I know nothing about this issue, just passing this along.

[onlyhomelites]

Oct 21, 2017 19:49:14 GMT -5 sweepleader said:

Here's another tidbit on Dykes rings: www.chainsawcollectors.se/phpbb3/viewtopic.php?t=520

I know nothing about this issue, just passing this along.

Great information in that link, thank you!

[lesorubcheek]

Hard to believe that's been over 10 years ago. Dang I'm getting old! There's numerous links scattered all around. Here's another from AS:
www.arboristsite.com/community/threads/dykes-ring.134468/

Dan