OS MAX S-30 RC Model Airplane Engine M7

Vintage PET OS 099 Nitro Glow Airplane Engine Control Line & RC Carburetor

OS Max-S 30 RC MODEL AIRPLANE ENGINE with muffler. Nice!

Vintage OS O.S. Pet 099 .099 RC Remote Control Nitro Model Airplane Engine M7

Enya 5229 .29 control line model airplane engine

FOX .50 r/c airplane engine

OS Max 15 Model Airplane Glow Engine With Muffler Sold As Is

Vintage OS O.S. Pet 099 .099 RC Remote Control Nitro Model Airplane Engine M8