Just finished getting my S25 all back together (Thanks Mike for the Piston & Rings) and during the course of this, I was impressed by the rugged yet simple design of the saw.
Anyone that owns one...already knows it is a powerful saw (for its size and weight), but until you take one apart its hard to appreciate the engineering involved.
One thing is plain, it was designed to withstand some rugged use (if not abuse). I replaced my fuel tank gasket (not that the old one was leaking) and noticed the tank was a full 3/16" thick.
All of the castings are well supported/reinforced and designed to be somewhat modular.
Its hard to believe they sold for what they did "back in the day".
They were a tremendous value then.... and an even better value today...since they can be found at garage sales, etc...for a fraction of the cost of a new (comparable) saw.
Its an easy saw to love.
Flint.