Thunder Tiger Out Board Marine Pro 21M OB TT9568

A race-proven PRO-21M power head is mated to a lower unit that utilizes the best aspects of gear and flex-cable drive technology. An innovative design that is sure to increase the popularity of the 3.5cc Tunnel Hull class.

A special set of precision helical gears transfers 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 Marine series are manufactured by automated computer-controlled machinery, resulting in a product that looks and performs better. The engine mount allows adjustment to both propeller depth and angle with a Prather S215 propeller which is included. Precision air bleed carburettor makes adjustments simple.

Specifications:

• Displacement: 14.78 cc.
• Bore: 28 mm.
• Stroke: 24 mm.
• Crankshaft: UNC 5/16 - 24
• Practical RPM: 2,000 ~ 16,000 
• Output: 2.75 BHP / 15,000 RPM
• Weight: 575 g. wo/muffler

Features:

• Top grade CNC technology used
• ISO9001 Certified
• Gear drive / flex cable
• Prather S215 propeller which is included
• Adjustable prop depth and running angle
• Air bleed carburettor makes adjustments simple
• Economic marine engine for the serious boat racer

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