This is a G-51 CONTROL LINE Engine from SuperTigre. *** 3-YEAR Warranty *** FEATURES: 2-Crankshaft Ball Bearings Schnuerle Porting New Silent Muffler for Quiet Operation Ringed Piston INCLUDES: One Silent Muffler w/Adaptor (header) One Operating Instruction Booklet w/Parts List and Decals One Glow Plug (FOXG1400) One Assembled Engine SPECS: Bore: 23mm (.905") Stroke: 20mm (.787") Weight w/o muffler: 313g (10.98oz) Weight with muffler: 459g (16.2oz) RPM Range: 2,000-12,000 Power Output: .95 BHP at 12,000 RPM Displacement: .51 cu in. (8.30cc) Width between centers of mounting holes: 42mm (1.65") Length between center of mounting holes: 19mm (.75") Width of crankcase excluding mounting flanges: 34mm (1.34") Length from backplate to front of drive washer: 80mm (3.15") Height from bottom of crankcase to top of head: 87mm (3.43") Crankshaft size: 1/4-28 Suggested Props: 11x6 REQUIRES: A fuel with between 5%-15% Nitromethane and a 17% or better lubricant content (All the fuels we carry meet this lubricant requirement). Prop, Engine Mount upMAF5/3/99 jbn8/10/94 ir/jl updt jxs 2/12/04 updt lmm 3/26/09