045 Questions

[jnutting8]

Have 5 (yes, 5! 045's) that im trying to salvage one or two complete saws. I know enough to be dangerous, but definitely no expert. two questions:

First photo, why is the hole at base of cylinder plugged in one (and a few others I have) but ported/nipple in the other? Looking at creepBay I see many cylinders with no hole or it plugged and a few with the nipple.

Next, the 858+1A - does that denote an OEM Stihl cylinder?

thank you!

 

[hotshot]

The early Stihl 045s used that brass cylinder base impulse port on 50mm bore cylinders, then later changed to a ported elbow from the back of the crankcase for most 52mm & all 54 & 56 jugs.

Likely some parts mixing & hole plugging was needed along the way, until production used up all the remaining older parts. You’d have to do the same when building one up from scratch.

That 858+1A casting is an OEM cylinder, & it looks like ‘KS’ Kolbenschmidt made it. Mahle was the other cylinder manufacturer or supplier at the time.