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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

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$389.99
AUD $389.99
    • Stock Number: OSMG1622
    • Displacement: 0.213 cu in (3.49 cc)
    • Bore: 0.641 in (16.27 mm)
    • Stroke: 0.661 in (16.8 mm)
    • Practical RPM: 4,000-45,000
    • Output: 2.8 ps/2.76 hp @ 33,000 rpm
    • Weight: 10.85 oz (307.5 g)

  • Includes:

    • 21D carb,
    • RP7 turbo plug 
    • Exhaust seal ring 
    • Head gasket set
    • Dust cap set

     

    Requires:

    •  10-30% nitro boat fuel (20% recommended for break-in)
    •  Exhaust system, glow plug igniter
  • Domestic Shipping starts at $29.99 for this item plus $15.30 for each additional item . International Shipping starts at $45.00 for this item plus $29.99 for each additional item. Shipping availability to your country and Total Shipping will be finalized at check out.