O.S. Engine 21XZ-B nitro engine

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O.S. Engine 21XZ-B

The new O.S. Engine 21XZ-B offers top-of-the-line power and performance at an unexpectedly low price. The O.S. Engine 21XZ-B offers less weight and a lower center of gravity on one hand, and improved torque and acceleration on the other, making the O.S. Engine 21XZ-B a savvy choice for racing. Other improvements include a stronger crankcase, and the new 21J2 three-needle carburetor that offers improved fuel mileage and a 7 mm restrictor for added fine-tuning finesse.

O.S. Engine 21XZ-B specifications

Stock Number: OSMG2050
Displacement: 0.21 cu in (3.5 cc)
Bore: 0.6 in (16.3 mm)
Stroke: 0.7 in (16.8 mm)
Output: 2.5 hp @ 33,000 rpm
Practical RPM: 4,000-40,000
Weight: 12.6 oz (357 g)
Includes: 21J2 carburetor, P3 glow plug, 7 mm carb restrictor, exhaust seal and dust cap set
Requires: Glow fuel, muffler, tuned pipe and manifold

O.S. Engine 21XZ-B recommended mufflers and accessories

OSMG2938 72106135 T-2060SC WN Tuned Pipe Set
OSMG2939 72106130 T-2060 WN Tuned Pipe
OSMG2701 72106430 M2000 Exhaust Manifold
OSMG2702 72106440 M2000SC Exhaust Manifold