This is the SuperTigre G-34 Ring Control Line Engine with Muffler. FEATURES: Control line engines replace the carburetor with a venturi that keeps the engine running at a constant speed Schnuerle porting, dual ball bearings and friction reducing cylinder sleeve Three year limited warranty INCLUDES: Supertigre G-34 Ring Control Line Engine with Muffler, header with gasket, glow plug (FOXG1400), venturi, pressure fitting and illustrated instruction manual REQUIRES: Car fuel with 0-15% nitro content and 18-20% lubricant Propeller: 8x7, 9x6, 9x7, 10x5 Glow starter and field equipment SPECS: Displacement: .34 cu in (5.5cc) Bore x Stroke: .787x.669" (20x17.5mm) Output: BHP/RPM .98 @ 16,500 Weight with Muffler: 12.73oz (363g) Distance between mounting holes same side: .59" (11mm) Distance between mounting holes opposite side: 1.5" (38mm) Height from crankcase bottom to top of cylinder head: 2.99" (76mm) Height from bottom of mounting tab/top of cylinder head: 2.40" (61mm) Crankcase width below mounting tabs: 1.18" (30mm) Distance from rear cover plate screw/front bearing: 2.87" (73mm) Distance from center of piston to front bearing: 2.13" (54mm) Crankshaft size: 1/4-28 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. jxs 7/11/06 ir/jxs updt lmm 3/26/09