Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I’m expecting delivery today.
As an aside, after I placed the order, they came out with the upgrade kit with stainless liners and metal ringed pistons. I knew I’d eventually want them, so bought them. Just yesterday I noticed the engine listing on the enginediy (and stirlingkit) site lists it as having the metal rings and stainless liners.
I’m thinking the stainless liners don’t get the same kind of honing used with CI we were taught back in the day. I think it’s just a matter of not running the hell out of it until things settle in a bit.

It is expensive, but If I didn’t buy it, I’d probably end up with every hit and miss version over time, spend nearly the same money. As it is I have the m91, and now the big horse to power a mini sawmill. I bought the yellow (probably gold electroplated) version, and intend to make a brass radiator surround ala an old cat gas dozer or stationary saw engine.