The PRO engines are equipped with twin ball bearings, Schnuerle porting, twin needles and ABC-type ringed piston and cylinder that provides years of trouble-free performance.

Specification: Displacement: 14.96 cc. / 0.913 cu. in. Bore: 28 mm. / 1.102 in. Stroke: 24.3 mm. / 0.957 in. Crankshaft: UNF 5/16 / 24 Practical RPM: 2,000 ~ 16,000 Output: 2.75 BHP / 15,000 RPM Weight: 562 g. no muffler / 19.83 oz.

All Thunder Tiger engines have been designed to combine high performance with easy handling and maintenance using CAD computer technology, resulting in consistent high quality and reliability. Featuring aerospace-quality ball bearings to properly support the crankshaft at high RPM.

The Pro series are manufactured by automated computer-controlled machinery, resulting in a product that looks and performs better. Forged aluminum connecting rod with dual bushings connects it all together, and a unique "square" cylinder head design has more surface area than conventional engines, allowing for cooler runs. Precision air bleed carburetor makes adjustments simple, and efficient mufflers keep things quiet at the field.

NOTE: Engine does not come with muffler.