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Thunder Tiger MARINE ENGINE Parts PRO-21M-OB 9568

Thunder Tiger MARINE ENGINE Parts PRO-21M-OB 9568

  • $179.99

Displacement(c.c. / 3.46 c.c. / .211 
Bore(mm / in.) 16.6 mm / 0.654 in. 
Stroke(mm / in.) 16.0 mm / 0.630 in. 
Practical R.P.M.(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 


1. PRO-21MOB engine x 1 EA 2. Carburetor Assembly x 1 EA 3. Allen wrench x 3 EA (2.5mm &2mm &3mm) 4. Instructional manual x 1 EA 5. TT logo sticker x 1 EA



The Thunder Tiger Pro-21M-OB Outboard engine features an innovative design bound to greatly increase the popularity of the 3.5cc Tunnel Hull class.
A 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.

The PRO-21M-OB (No. 9568) is equipped with 1.04:1 gear ratio

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