Help me and tell me about this engine. It came on a plane I bought. I think the guy said it was a RCS 180, but I can't tell. The box he sent has AirMoki on it and has Moki 20hds on it along with best b120230 but may not be the original box. The engine has stamped on the side 13rc. Also where can I get a prop washer and nut for it, for it has whats in the pics with it. If anyone can tell me the HP and prop size too, thanks Randy

Yes it looks like a Moki 23 or 30cc engine. These were imported into the US by http://www.rcshowcase.com/index.html

I would call RCS for parts and questions about your engine.

Looks like a RCS 1.4 that I got from RCShowcase back in the day 120 size gas motor that loves a 16 x 8 or an 18 x 6 APC, or Mejzlik

Thanks to all, I knew I could get the valuable info here, this place is great.