RCPlanet
Thunder Tiger Pro-21M-OB Outboard Marine Engine TTR9568
, Displacement(c.c./cu.in.):, 3.46 c.c./.211 cu.in., Bore(mm/in.):, 16.6 mm/0.654 in., Stroke(mm/in.):, 16.0 mm/0.630 in., Practical R.P.M.:, 3,000 ~ 38,000 rpm, Output(BHP/RPM):, 2.10 BHP/30,000 RPM, Weight(g/oz):, 720 g/25.39 oz, ,
This is the Thunder Tiger Pro-21M-OB Outboard Marine Engine with 1.04:1 Gear Ratio. The Pro-OB engine features an innovative design bound to greatly increase the popularity of the 3.5cc Tunnel Hull class.
The race-proven powerplant is mated to a lower unit utilizing the best gear ratio and flex-cable technologies. A special set of precision helical gears transfers all the power from the crankshaft to the flex-cable, resulting in substantially reduced cable wear and maintenance, while the integrated expansion chamber / muffler reduces exhaust noise. The engine mount allow adjustments to both propeller depth and angle. To top it off, a Prather S215 prop is included.
Features
Side exhaust
ABN construction : Aluminum piston with Nickel-plated brass cylinder liner
Hypereutectic machined Al-Si ringed piston
High strength connecting rod with bushings pre-installed
SG crankshaft for clutch system
Water-Cooled Cylinder Head
One-piece crankcase with squared-off cooling fins
Dual ball bearing-supported crankshaft
2 Needle valves carburetor
9mm carb bore
Vertical mounted main needle valve
State-of the-art CNC machined components
Redline R2 glow plug included
Note
The PRO-21M-OB (No. 9568) is equipped with 1.04: 1 gear ratio
Check price and availability
Found 11 years, 9 months ago