O.S. Max .21 VZ-M turbo marine engine has the water intake mounted directly onto plug channels water to the center pf cylinder head-the hottest part of the engine. ABC cylinder construction-"A"luminum piston,"B"rass cylinder liner that is "C"hrome plated. Liner porting and inner head designed specifically for high nitro boat competition. Rotary type, big bore (10mm) 21D carburetor. Water-cooled plug cap and 2K flywheel. Rear exhaust. This product includes O.S. Max .21 VZ-M Turbo Marine Engine with P7 turbo glow plug, flywheel, 21D carburetor and instruction manual.

Fuel: 10-30% nitro (see page 10 of manual for more information)
Starting Belt: Starting Belt 15" or Starting Belt 17" or Starting Belt 19"