This is the O.S. Speed B2102 .21 Off-Road Nitro Engine. The innovative B2102 engine comes equipped with a low profile head which provides great influence to the running performance. The low-profile cooling head (-17mm) makes the vehicles center-of-gravity much lower, which improves car handling drastically without sacrificing cooling performance. The B2102 also comes equipped with the O.S. 22C (B) carburetor for improved fuel mileage to go the distance; ten-minute runs on a single tank are no longer a privilege of top drivers with magic fingers.
FEATURES Low cylinder head reduces the buggys center of gravity by 0.67 (17mm) for better stability during aggressive driving Newly designed 22C slide valve carburetor for better fuel economy Tungsten weighted crankshaft with diamond-like coating and silicon potting Bypass of crankcase is modified for better performance Tuned pipe is constructed of aluminum with polished natural finish and has an EFRA-2089 noise rating
INCLUDES O.S. Engines Speed B2102 Engine with P3 Turbo Glow Plug T2090SC Tuned Pipe 6.5mm Carburetor Reducer in Red Exhaust Seal Ring One each 3mm, 16mm and 18mm Dust Caps Instruction Manual
REQUIREMENTS Fuel: 10-30 nitro content, 20 recommended for break-in Air filter, glow starter and track equipment
SPECIFICATIONS Engine Displacement: 0.211 cu (3.46 cc) Bore: 0.646 in (16.40 mm) Stroke: 0.646 in (16.40 mm) Practical RPM: 4,000-42,000 Power Output: 2.65 PS2.61 hp 34,000 rpm Weight: 12.25 oz (347 g) Crankshaft Size: UNF14-28 Distance Mounting Hole Centers Same Side: 0.83 (21mm) Distance Mounting Hole Centers Opposite Side: 1.45 (37mm) Width of Crankcase below Mounting Tabs: 1.2 (31.6mm) Width of Mounting Tabs: 1.8 (45mm) Height Mounting Tab to top of Cylinder Head: 2.6 (65.9mm) Height Mounting Tab to center of Exhaust Outlet: 1.1 (28mm) Height Crankcase Bottom to top of Cylinder Head: 3.2 (81.5mm) Length of Crankshaft end to Front Bearing: 1.2 (29.5mm) Length of Crankshaft end to Backplate: 3.7 (94mm) Length of Crankshaft end to Center of Crankcase: 2.9 (73.5mm) Carburetor Settings (Carburetor is preset from factory and should only require very small adjustments) Needle Valve: 3 turns open from fully closed Mixture Control Valve: One turn screwed in from flush position with carb body Metering Needle: 0.3-0.4mm protruding from flush position with carb body Throttle Stop Screw: Approximately 0.5mm from carb body when viewed from above T2090SC Tuned Pipe Length: 6.6 (167mm) Diameter: 1.4 (35.2mm) Exhaust Outlet Diameter: 0.31 (8mm)
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