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
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O.S. .21XM VII 3.46cc Outboard
Air Cooled Marine 13941
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Designed expressly for small
and medium size outboard boats
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Installed aluminum tilt
transom mounting plate
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Preassembled outboard unit
with flexible propeller
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Blue anodized aluminum heat
sink head
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42mm carbon fiber propeller
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20J carburetor
Specifications
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Displacement: .21 cu in
(3.5cc)
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Bore: 0.654" (16.6mm)
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Stroke: 0.630" (16mm)
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Practical RPM: 3,000 - 25,000
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Power Output: 1.3 hp
(25,000RPM)
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Weight: 24oz (682g)
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Carburetor Settings:
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Needle Valve; 2.5 turns
from fully closed
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Mixture Control Valve:
Shoulder portion exactly at a tangent to the throttle rotor hole
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Distance between mounting hole
centers same side: 0.98" (25mm)
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Distance between mounting hole
centers opposite side: 1.5" (37.5mm)
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Distance/outer mounting hole
centers on steering arm: 2.5" (64mm)
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Width of muffler: 1.8" (46mm)
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Distance from flywheel to skeg:
8.6" (219mm)
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Distance from mounting plate
bottom to skeg: 3.4" (86mm)
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Distance from mounting plate
top to flywheel: 3.5" (87mm)
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Distance from mounting plate
to end of cavitation plate: 7.2" (183mm)
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Distance from mounting plate
to prop attachment point: 5.9" (149.5mm)
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Distance from bottom of mount
to driveshaft center: 1.3" (34.5mm)
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Height of mounting plate: 1.8"
(46mm)
Contents
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O.S. 21XM Version II Outboard
Marine Engine, Muffler, Mounting Plate, #8 Glow Plug, Propeller, Outboard
Unit, Steering Arm and Instructions
Requirements
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Glow Fuel: 10-30% nitromethane
content, use 20% for break-in
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Glow plug igniter, starting
belt and shore equipment
Comments
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