I added this guy to my stable:
View attachment 822859
Bought it from our buddy in Hungary (
@David Major thanks again) as an MS-650 that was low on compression and would not stay running. I put on a new top end (used Mahle OEM jug, Hyway pop-up slug, Caber rings). Interestingly, when comparing the old and new slug, they are the same diameter. The old slug has "Italy" cast into the bottom, so I am assuming that it was a Meteor. Obviously, someone was already into this engine, but why the 660 top end? I'm thinking 1 of 3 things:
- It started life as a 560 and someone put a 660 top end on it
- It left Stihl as a 660 and someone replaced the top cover with one from a 650
- Stihl went the Poulan route (where every Poulan 42cc and smaller has the same 42cc engine), though not likely
The exhaust side of the slug is shot (top ring is stuck). There are also some imprints on the top of the slug (pieces of a busted ring perhaps). There are also similar imprints at the top of the jug. The top edge of the exhaust port is also booggered up. Otherwise, the jug looks usable - probably no worse than a badly manufactured chi-com clone.
I also replaced the decomp (which was dead 3x over) and put on an AM "west coast" clutch cover.
@psuiewalsh hooked me up with the 32" bar (thanks dude).
I suspect that the dying decomp leaned out the top end, created a hot spot on the exhaust side of the slug, and the ring(s) broke due to the heat. The rest of the damage is self explanatory.
I plan to add a full-wrap handle and the outer spike.
It's not really a 650 anymore, so I needed to add the go-fast sticker.
View attachment 822860
I had it in a 30"+ diameter piece of oak. There was a steady stream of chips flying out of it.
@James Miller - This is my 6 cube (ish) over powered, unnecessary, "compensation" saw!!!