hey,
i have found a engine from OS in my uncles storage, but I don´t know what type it is.
I uploaded some pictures.
Does someone know the exact classsification of this egine?????
THX
TosT

What are the markings on the side of the engine opposite the exhaust port? Also, it's hard to see, but we do believe that the number below the exhaust port is a "20". Our best guess right now is that it's an O.S. Max .20FP.

hey bill,
thanks for answering.
I looked in the OS history and came to the same solution. Is the OS Max 20FP.
Thanks.

Do you think it´s possible for me to get the engineering drawings of this engine?

Engineering drawings are not available. O.S. doesn't release them. If you mean drawings of the exterior, we don't have them either. O.S. doesn't make them available for all their engines.