M-works O.S.Speed R21-M6 Marinmotor M-Works
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Beskrivning
Art.nr: MW-R21M6
Product Info:
O.S.SPEED R21-M6 M-Works Marine Racing 3.5cc Engine
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.
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: 254g
Included:
O.S.Speed R21-M6 Minicars Works Marine Engine
RP6 Glowplug
O.S.Speed flywheel cone
O.S.Speed decal
O.S.SPEED R21-M6 M-Works Marine Racing 3.5cc Engine
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.
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: 254g
Included:
O.S.Speed R21-M6 Minicars Works Marine Engine
RP6 Glowplug
O.S.Speed flywheel cone
O.S.Speed decal