It’s hard to tell because most of them aren’t branded. And even if they were, they still come from multiple different manufacturers even with the same name on them. The only ones I’ve seen that were consistently named were Tecomec, Meteor, and Hiway
Thank you for the reply. Are there any specific places to look for markings? The only thing I can find is 1128 in the top left corner above the plug.
What does a slant fin jug indicate, 10mm? Did oem cylinders ever come from the factory without a decomp? The lack of one made me instantly assume aftermarket.
Thank you. I’ll have to do more looking into this saw. It runs to good to be aftermarket. I’m hoping that is the case but wrote the top end off when it had no decomp.
I would say that is an OEM cylinder, they are the hot tomale of the 044 era, I have 3 NOS ones sitting on the desk in front of me, they are all Mahle versions. I think the oldest one has a W2 with just one + mark on the clutch side transfer bulge, the next one has W1 with two + marks on the transfer, the third one has a W3 with five + marks on the transfer bulge. The combustion chambers are very small cc wise making very good compression numbers, the ports are timed very well also.
It’s a slant fin copy, so it wouldn’t have a decomp. Decomps are in some of the 440 straight fin cylinders.
On most of the slant fin cylinders, left hand front cylinder fin will have 1128 on it. Move back inboard to the space between the first upright fins and look carefully down between the fins, should be able to just make out, Stihl ,with its registered trade mark, there also can be a capital /S/ down there. It has been on every OEM slant fin cylinder I have handled, it may be very faint but should be there.
Thanks guys. The right side transfer bulge is covered by the top of the case just above the clutch drum. There are no markings on the left side bulge.
I was in a hurry when I took that pic , did not notice the bits of dust until I posted the pic on here . One cannot see the other markings I posted about without pulling the cylinder off the case, no need now as you say it runs with plenty of power. My curosity is still peaked though to if an AM company actually copied the angle fin cylinder. It would be great for those looking to give their 044 and MS 440`s a power boost right out of a box. The piston does look like one of the very early black coated pistons that some of the AM manufacturers were selling back around 2007.
