O.S. .21XM VII 3.46cc Outboard Air Cooled Marine 13941
This is the O.S. 21XM Version II Air Cooled Outboard Marine Engine.
****** Because of the competition nature of this engine,******
******it is NOT covered by the O.S. 2 Year Warranty.******
Features
O.S. .21XM VII 3.46cc Outboard Air Cooled Marine 13941
Designed expressly for small and medium size outboard boats
Installed aluminum tilt transom mounting plate
Preassembled outboard unit with flexible propeller
Blue anodized aluminum heat sink head
42mm carbon fiber propeller
20J carburetor
Specifications
Displacement: .21 cu in (3.5cc)
Bore: 0.654" (16.6mm)
Stroke: 0.630" (16mm)
Practical RPM: 3,000 - 25,000
Power Output: 1.3 hp (25,000RPM)
Weight: 24oz (682g)
Carburetor Settings:
Needle Valve; 2.5 turns from fully closed
Mixture Control Valve: Shoulder portion exactly at a tangent to the throttle rotor hole
Distance between mounting hole centers same side: 0.98" (25mm)
Distance between mounting hole centers opposite side: 1.5" (37.5mm)
Distance/outer mounting hole centers on steering arm: 2.5" (64mm)
Width of muffler: 1.8" (46mm)
Distance from flywheel to skeg: 8.6" (219mm)
Distance from mounting plate bottom to skeg: 3.4" (86mm)
Distance from mounting plate top to flywheel: 3.5" (87mm)
Distance from mounting plate to end of cavitation plate: 7.2" (183mm)
Distance from mounting plate to prop attachment point: 5.9" (149.5mm)
Distance from bottom of mount to driveshaft center: 1.3" (34.5mm)
Height of mounting plate: 1.8" (46mm)
Contents
O.S. 21XM Version II Outboard Marine Engine, Muffler, Mounting Plate, #8 Glow Plug, Propeller, Outboard Unit, Steering Arm and Instructions
Requirements
Glow Fuel: 10-30% nitromethane content, use 20% for break-in
Glow plug igniter, starting belt and shore equipment
Comments
This Engine STARTS AND RUNS IN A CLOCKWISE DIRECTION at the starter cone. Any attempt to start engine in a counter-clockwise rotation may cause serious damage to the engine. Because of the clockwise rotation, the crankshaft has reverse threads.
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