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Get your racing boat up to Speed!
It's O.S.'s first marine engine under the Speed name, and is designed to deliver the same race-winning performance. Factory tuning optimizes the 21XZ-M's power potential, and it also shares the 21XZ-R's big-bore carb, black anodized crankcase and laser-etched, water-cooled head.
- The crankshaft has DLC (Diamond Like Coating) and is silicone-filled for more efficient intake; two tungsten weights provide optimum balance for low- and mid-speed torque
- The cylinder head is water cooled
- The 21D big-bore carb allows for the use of high-nitro fuel
- An RP7 turbo plug is included