This is an R/C (throttled) G-34 Sport Airplane Engine. *** 3-YEAR Warranty *** FEATURES: Ringed piston construction Dual Ball Bearings SuperTigre Scavenged Porting Includes Muffler and Glow Plug INCLUDES: One Assembled G-34 Ringed Engine w/Carb One Glow Plug One Exhaust Header One Muffler w/Hardware Bag One Instruction Set, Decals, and Parts List REQUIRES: Prop, Glow Fuel, Engine Mount, Fuel Filter SPECS: Bore: .787" (20mm) Stroke: .669" (17mm) BHP/RPM: .98 @ 16,500 RPM Range: 2,500-17,000 Displacement: .34 cu in (5.50cc) Weight w/o muffler: 275g (9.65oz) Weight with muffler: 363g (12.8oz) Width between centers of mounting holes: 38mm (1.50") Length between centers of mounting holes: 15mm (.59") Width of crankcase excluding mounting flanges: 30mm (1.18") Length from backplate to front of drive washer: 73mm (2.87") Height from bottom of crankcase to top of head: 76mm (2.99") Crankshaft size: 1/4-28 Suggested prop size: 9x6, 9x5 Carb Settings: H-2-turns out from closed position. L- Take carb off, rotate and look at bottom side. Turn trottle until wide open, set tip of low end needle half-way across cat eye. COMMENTS: Replacement exhaust muffler gasket is SUPG4660 MAF4/29/99 updt jxs 2/12/04 updt lmm 3/26/09