O.S. .21XM VII Air Cooled Outboard Marine Engine w/20J Carburetor
This is the O.S. .21XM VII Air Cooled Outboard Marine Engine. Leave it to the engineers at O.S. to concoct a sure-fire recipe for marine racing success! First, they started with the .21XM, O.S.' exceptional outboard engine and winner of 11 championships in a 4-year span. They then upgraded the cylinder head and muffler. The result: the .21XM VII, an air-cooled powerhouse that's even faster than the original!
Cooling the cylinder head with air is more reliable than water cooling, and prevents over cooling. It also adds the benefits of simplified construction and reduced maintenance. The redesigned muffler is larger than the muffler used with the .21XM, but the VII's muffler is still just as easy to tune, is detachable for easier maintenance, and is also more responsive than a tuned pipe.
Displacement: 0.211 cu in (3.46 cc)
Bore: 0.654" (16.6 mm)
Stroke: 0.630" (16.0 mm)
Practical RPM: 3,000-25,000
Output: 1.3 hp @ 25,000 rpm
Weight: 24.1 oz (682 g)
Prop Shaft Diameter: 3/16 in
Requires: 10-50% nitro boat fuel with at least 18% oil content, starting equipment, fuel tubing
Includes: mount, outdrive unit, E-2050-2 removable muffler, starter cone, #20J carb, #8 glow plug, steering bracket, throttle link assembly & 42 x 1.2 carbon prop
This product was added to our catalog on July 18, 2011