OS Max 46 FX ABC RING OS Muffler Bench Test

Testing of an OS MAX 46 FX (ABC special modded). Prop: APC 10x7 Fuel: 20% Castor 5% Nitro Carburetor: OS with after market remote needle) Exhaust: OS MAX silent muffler I rebuild this Engine after I bought it in bad condition (Liner flaking, rusty... as usual). I used a Magnum 46XLS brass/chrome liner and a piston from a 46SF with ring. The engine runs very well and throttlability is like an electric engine