O.S. boat engines

O.S. MAX ENGINE R21-M05 MARINE ( New 2014 )

€386.04
13-0598
O.S. MAX Engines Japan
In stock

Internal combustion engine from Japanese company O.S. Max for model boats.

New 2024, high-performance Marine Special Edition OSSPEED R21-M05 engine with 3.5 cc capacity and long stroke !

Features:

  • Modification 2024: New combustion chamber with smaller volume for low nitro content and upgraded piston for easier lapping
  • Newly developed black OSSpeed crankcase with Minicars Marine laser engraving
  • Black anodized water-cooling head
  • DLC-coated and balanced "SG-type" crankshaft (4.5mm balancing weights)
  • 9-port cylinder liner with 3-port exhaust
  • Backplate with steel pressure plate for less friction and increased durability
  • Kit does not include a carburetor - choose your own carburetor (15 mm diameter sleeve)

Technical data:

  • volume: 3.49 cm3
  • piston diameter: 16.08 mm
  • piston stroke: 17.20 mm
  • power: 2.76 hp at 35,000 rpm
  • rPM range: 4 000 - 43 000
  • weight: 265 g

Set includes:

  • motor
  • rP7 glow plug

Note: the kit does not include the carburetor and muffler.

*Follow the instruction manual included with the product.

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In the industry since 1991.

Many years of RC models experience.
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