O.S.Speed R21-M06 Minicars Marine Engine

Introducing the new 2025 O.S.Speed R21-M06 Minicars Special Edition 3.5cc marine racing engine made by O.S.Engine in Japan!

Features:

• New 2025: DLC coated & balanced R21 Euro-II crankshaft with more timing
• New 2025: 9-port cylinder liner with 3-port exhaust & new piston with 3 oil-grooves
• New 2025: Ceramic main ball bearing
• New 2025: Reinforced "R" conrod
• New 2025: RP6 Turbo plug (instead of RP7)
• New combustion chamber with smaller volume for lower nitro levels
• O.S.Speed developed black crankcase with Minicars Marine Laser Engraving
• Black anodized water cooling head with Minicars Marine Special Edition Laser Engraving
• Backplate with steel thrust plate for lower friction and increased durability
• No carb included - choose your own carburetor (15mm diameter neck)

Specs:

• Displacement: 3.49cc
• Bore: 16.08mm
• Stroke: 17.2mm
• Crankshaft dia: 14mm
• Practical r.p.m. Range: 4.000～43.000
• Output: 2.76hp @ 35.000r.p.m.
• Weight: 265g
• Water Cooling Nipple Thread: M5x0.8

Included:

• O.S.Speed R21-M06 2025-Edition Minicars Marine Engine
• RP6 Glowplug
• O.S.Speed flywheel cone
• O.S.Speed decal
• Printed Manual & partslist

Wholesale Distributed by Minicars Hobby Distribution AB.

Click HERE for more info