This is the O.S. Max .18CV-RX Engine with 11G slide valve carburetor, pull starter and standard crankshaft. Good for all ready-to-run 1/10 scale cars & trucks that require a pull-start power plant. Especially suited for off-road trucks and vehicles with single-speed transmissions. Fits Kyosho® Ultima ST Type-R Evolution, Tamiya TNX and the Tamiya TGR. FEATURES: Larger displacement and more power in a .15 size crankcase Slide valve carburetor with two screwdriver-adjustable needles, mixture control screw, 360° fuel inlet, 6.5mm bore True ABC construction with CAD designed 3-port liner Machined, aluminum piston boosts performance and enhances durability Standard ball bearing suppported crankshaft with enlarged fuel ports for smoother air and fuel flow Larger, thicker rear bearing handles racing loads with ease High volume #203 air filter assembly with two pre-oiled foam elements Satndard side exhaust Two year warranty INCLUDES: One O.S. Max .18CV-RX engine with, 11G carb, pull starter, #8 glow plug, air filter assembly with two elements, mounting spacers, four 3 x 14mm phillips head screws, instruction manual REQUIRES: Glow fuel for vehicles with 5%-30% nitromethane and no less than 18% lubricant content Most of the fuels we carry meet or exceed the lubricant content required for optimum performance and maximum engine life. In the past, the conventional lubricant content used in fuel was 18%. But with new advanced technologies, fuels like Red Alert and O"Donnell for example, have a better quality of lubricants even though the percentages of lubricant content are lower. These high-tech lubricants provide exceptional cooling and protection. Fuel filter Medium fuel tubing SPECS: Bore: 0.63" (16.0mm) Stroke: 0.59" (15.0mm) Displacement: .18 cu in (3.0cc) Practical RPM: 3000-32,000 Power Output: 1.35 PS/28,000 RPM Weight without Muffler: 10.4oz (295.5g) Width between mounting holes same side: 0.4" (11mm) Width between mounting holes opposite side: 1.2" (31.4mm) Crankcase width: 1.6" (40mm) Distance from starter to drive hub: 2.9" (74.8mm) Distance from starter to end of crankshaft: 3.4" (87.8mm) Distance from center of crankcase to drive hub: 1.6" (41mm) Height/bottom of crankcase to top of cylinder head: 4" (100.9mm) Height/center of crankshaft to top of cyinder head: 3.2" (80.9mm) Needle Settings: High Speed: 2.5 turns out from fully closed Metering Needle (low speed): 1 turns in from flush with ball link body Throttle Stop Screw:.3mm-.5mm open from fully closed jxs 5/18/04 ir/jxs updt jxs 6/29/04 updt lmm 4/16/09