Hello and greetings from Canada's west coast. I am hoping that somebody out there can help me. Purchased a NIB OS-40 four stroke at the NorthWest Model expo....everything there and new except no instructions. If anybody has a set that I can photocopy or if its possible to e-mail them to me I would surely appreciate it. Should note that this is a surpass engine. Going to put it in an a Pilot kit Cessna 152 designed for a 25 two stroke....I think the 40fs will haul it around in style. Thanks in advance and remember to keep the twirly thing in front spinning and at the end of the day may your take-offs equal your landings.

Are you sure that it is a surpass? I have the instruction sheet from the FS-40 that I could scan and send you.
Jerry

Hello!
You donīt need any further advise than this....just kidding!But all OS engines are easy to use!!!
Just use a 11x6 APC prop ...5-10%nitro, 15% Aerosynt II syntetic oil or 20% castor oil and go flying!
This is a really nice engine!

Regards!
Jan K
Sweden