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A proven on-road powerhouse comes to the boating world!
Based on the 21XZ-R - Performance at the 2011 IFMAR 1/8 scale On-Road World Championships — the 21XZ-M Inboard Marine Engine takes that race-winning technology and applies it to dominating .21-size boat competition! Many of the performance features found on the 21XZ-R are here; and by utilizing a water-cooled cylinder head and big-bore carb, the 21XZ-M will assert itself on the water with the same resounding success!

  • The cylinder head is water-cooled and blue anodized
  • The 21D big-bore carb allows for the use of high-nitro fuel
  • The crankshaft is silicone-filled for more efficient intake; two tungsten weights provide optimum balance for low- and mid-speed torque
  • The cylinder liner has seven scavenger ports and three exhaust ports, for better, more efficient combustion
  • The piston is balanced and lightened, and the con rod had been made more durable
  • An RP7 turbo plug is included

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$512.00
AUD $512.00
    • Displacement: 0.21 cu in (3.5 cc)
    • Bore: 0.640 in (16.27 mm)
    • Stroke: 0.661 in (16.8 mm)
    • Practical RPM: 4,000-45,000
    • Output: 2.75 hp @ 33,000 rpm
    • Weight: 12.3 oz (348 g)

     

    NOTE: Do not use car or truck fuels; use fuels
    designed for boat use

  • Includes:

    • Glow Plug RP7 for T-type head (Turbo head) - (1 pc)
    • Cylinder-head gasket (0.2mm) - (1 sheet)
    • Exhaust Seal Ring - (1 pc)
    • Dust Cap dia 3, dia 16, dia18 - (1 pc each)

     

    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 $15.00 for each additional item . International Shipping starts at $45.00 for this item plus $39.00 for each additional item. Shipping availability to your country and Total Shipping will be finalized at check out.