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O.S. Engines

21XM Version II Air-Cooled Outboard Marine

Engineered to take down the competition!

O.S. 21XM Version II Air-Cooled Outboard Marine
stock#
LXBBLY
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Take down the competition with the 21XM Version II Outboard Marine engine from O.S.! It retains many of the features found on the successful 21XM, including the 20J carburetor and #8 glow plug. New additions include efficient air cooling, a larger muffler and more!


Specifications
Displacement: 0.21 cu in. (3.5 cc) Output: 1.3 hp (25,000 rpm) RPM Range: 3,000-25,000 Weight: 24 oz (682 g) Bore: 0.654 in (16.6 mm) Stroke: 0.630 in (16 mm) Requirements: Glow fuel with 10-30% nitromethane content (use 20% for break-in), Glow plug igniter, Starting belt, Shore equipment
Please note: because of the competition nature of this engine, it is not covered by the O.S. 2-year limited warranty.

Also note: this engine starts and runs in a clockwise direction at the starter cone. Any attempt to start the engine in a counter-clockwise rotation may cause serious damage to the engine. Because of the clockwise rotation, the crankshaft features reverse threads.



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