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The seal presses into the case, just like a 272 or 372. The orange thing you ask about is the case itself.

Which is a Poulan S25

Functionally, there is no good reason to swap the crank driven oiler for a clutch driven one. I can tell you from experience that it will oil a 25" bar with no issues. Yes, a clutch driven oiler is going to be less messy with the saw idling, but you need to evaluate how much time you actually...

I like to have a poke through the meteor catalog for stuff like this. They list every dimension in the book. https://www.meteorpiston.com/web/content/2996?unique=f337c7dffafe397f66888cdb00a132ae9428c684&download=true

I have an early boot impulse 670 jug that came to me with the pulse nipple added at an odd angle, and a non impulse boot. I suspect there may have been an update kit at one point. I will have to poke through the service bulletins one of these days.

This is one of our pole saws at work. They managed to break the intake manifold, and I think that caused it to overrev enough to float the valves and knock the rocker out of place... Came to me "it feels like it has no compression..."

That's the 357/359 bearings that are made in Japan. The top covers are the same ones I posted earlier, from the same UK based seller.

That's not a 154 chassis clone, that's a 162 chassis. My guess is open port 48mm, so a 61 clone. I would be very surprised if it was a closed port 162/630 jug.

We did identify that he does indeed have a Tecomec cylinder in PM's.

Husky still builds the 61, 272, 281, 288, 353, 365 Special and OE 372, Stihl still builds the 260, 361, 382(evolution of the 038,) 660, 780/880, the 210/230/250 are very long in tooth, and of course there is the ms070/ms720 for truly old designs. We may not get them in North America, but there...

I think you may have a Tecomec cylinder on there.

My old man started running saws in 1954, and finally had to retire from the bush in 99 due to injury(back was pretty much toast from having a tree fall on him in 91.) He didn't have much good to say about the reliability of what he considered to be the old saws, especially North American ones...

Just got my hands on this odd little creature. 1975 P50. 50cc, 42mm x 36mm. Overall a very unique design, hiding a few very modern touches. Google translate butchered the brochure a bit, but it mostly makes sense. I have had it running, currently waiting on a carb kit.

https://chainsawpartsonline.co.uk/jonsered-625-630-super-ii-670-champ-top-carry-handle-503617101/ Same seller, this time a manufacturer out of Turkey.

Pretty much 10 business days to me in central Canada, a friend of mine in Maine had them in 10 days total.

Big news, I found a thing! Ordered from here: https://chainsawpartsonline.co.uk/top-cylinder-cover-shroud-red-for-husqvarna-266-chainsaws-oem-501686006/ Made by these guys in Serbia: https://pejo.rs/ Worked out to about $36US/$49CAD shipped each. They are proper fiberglass reinforced...

The commonality ends at the tank and handle. The 257/262 are 154 chassis saws, with a long connecting rod crank, so you can't even put either top end on a 154/254. All of them are 34mm stroke. The 50/51/55 share crank/flywheel/clutch, intake and piston/cylinder with the Partner 500/5000 family...

That's for an early 50 Rancher, date stamp is 1984.

Stay away from the Hyway/Meteor closed port jugs. They just closed in the open port, and they do not have proper transfer port shapes. It's a struggle to make them run as good as stock. If you want to hunt for performance, you want a Partner 5000/Jonsered 490(44mm) or Partner 5000/Jred...

It usually ends up that way! Lol