Ace Electronics

Thunder Tiger - GP 42 ABC Engine w/Muffler

GP 42 ABC Engine w/Muffler

Product No. 9041

The GP series engines are equipped with maintenance-free bronze bushings, Schnuerle porting, a non-ring piston, an easily adjusted air bleed carburetor, and a safe angular needle valve.

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. The GP-42 engine provide excellent performance and value for .40-powered trainers.

The GP series are manufactured by automated computer-controlled machinery, resulting in a product that performs as well as it looks. Ultra-dense aluminum alloy castings, one-piece machined crankshafts and high silicone-content pistons are produced to exacting tolerances for more power and easier starts. Precision air bleed carburetor makes adjustments simple, and efficient mufflers keep things quiet at the field.

A Closer Look


  • Top grade CNC equipment, state-of-the-art technology are used to create the GP series.
  • Improved carburetor; swept back for safety, which makes adjustments simpler.
  • One-piece machined crankshafts and high silicone-content pistons.
  • Improved quality; ISO9001 Certified which guarantees the maximum power and performance.
  • Designed for both beginners and experienced modelers.
  • Excellent performance and value for .40-powered trainers.
  • Optimized Air-fuel ratio.
  • Smooth throttle transition.
  • Dependable Idle.



  • Glow plug
  • Prop
  • Engine mount
  • Fuel filter
  • Fuel (fuel with castor oil recommended)


  • Displacement: 0.396 cu in (6.49 cc)
  • Bore: 0.0.835 in (21.2 mm)
  • Stroke: 0.724 in (18.4 mm)
  • Crankshaft: UNC 1/4 / 28
  • Practical RPM: 2,000 - 17,000
  • Output: 1.10 hp @ 16,000 RPM
  • Weight w/o muffler: 12.6 oz (357.2 g)