Saw Troll: <i>I think the 162 was the Husky that resembled the 630 closest in power output, but I don't know anything about the porting of those saws.</i>
Många tak, SawTroll.
Interesting how I can get things mangled: 162/261...!?
During the transition period, when the 6xx Jonsered saws were sold here in N. America, they were available with some of the same and some different cylinder/piston arrangements compared to Husqvarna. As you're surely aware, not all of Husky's cylinders came from the same place either. My old 670 had a Gilardoni assembly, but some didn't have the maker's name clearly visible. Some were from Mahle.
So far as I know, the J625 and H61 were 60cc, open, finger-ported saws. There was a H268 that was also open ported, at 67cc . J630 was closed ported 60cc, and there 3 or 4 part numbers for the cylinder assy over the years here. J670 and H266, H268XP were 67cc closed ported, and there were a bunch of part numbers, some of them the same, between Jred and Husky. during that time. Jonsered never sold a 70cc model to correspond with the H272, at least not here in N. Am.
I suppose each part number corresponds to changes in suppliers and design; someone out there probably knows the absolute best one to look for. I have a hard time telling the diff in perf. between my Jred 670 with a 272 cylinder assy on it and a 266xp; I doubt if could tell the best from the worst out in the woods at all.