M-Works O.S.Speed R21-M6 Marine Engine MW-R21M6
£399.99

Shipping from:
£8.50

Brand:  M-Works
Part No: MW-R21M6
Barcode: 7340056106022
Availability : 1 in stock

This is the new 2026-edition Minicars Works O.S.SPEED R21-M6 3.5cc long-stroke competition engine.

Features:

• NEW 2026: two water cooling heads are included - std volume + a new M-Works head with larger volume!
• DLC coated & balanced R21 Euro-II crankshaft with more timing
• 9-port cylinder liner with 3-port exhaust
• Piston with 3 oil-grooves
• Ceramic main ball bearing
• Reinforced "R" conrod
• Backplate with steel thrust plate for lower friction and increased durability
• No carb included - choose your own carburetor (15mm diameter neck)

Suitable for competition boats (experience level ”high”):

• Offshore (with gear deduction)
• Endurance (with gear reduction)
• The R21-M6 is not recommended for Hydroplanes with direct drive as its too peaky for that application and the extra possible power is not needed.

Recommended fuel:

• 12% nitro fuel with 8% Klotz Benol oil (Recin) + 4% Klotz Original Techniplate (Synthetic)
• We don't recommend running the engine with less oil than the above recommended levels. You may add more recin/castor oil (Klotz Benol) in extreme conditions and heavy loads.

Performance R21-M6 vs R21-M5:

• The R21-M6 has even higher timing numbers in the crankshaft and piston liner.
• The R21-M6 has more peak power but a narrower power-band.
• The R21-M6 is the highest performance out-of-the box engine for gear-reduction applications.
• The R21-M5 is easier to set-up as it's less peaky and have more torque vs the R21-M6.