FA-125A AAC with Muffler: AG


FA-125A AAC with Muffler: AG


FA-125A AAC with Muffler: AG

Image for FA-125A AAC with Muffler: AG from HorizonHobby

Type: 4-Stroke
Displacement: 1.25 cu in (20.52cc)
Bore: 1.24 in (31.7mm)
Stroke: 1.02 in (26.0mm)
Cylinders: Single AAC
Total Weight: 24.69 oz (700 g)
Engine (Only) Weight: 21.87 oz (620 g)
Muffler Weight: 2.89 oz (80 g)
Crankshaft Threads: M8 x 1.25mm
Benchmark Prop: APC 16X6 @ 9,000 rpm
Prop Range: 15×7 – 17×6
RPM Range: 1,800 – 10,000 rpm
Fuel: 10% – 30% nitro Synthetic mix
Mounting Dimensions: 119 x 60 x 127mm
Muffler Type: Cast
Cylinder Type: AAC
Carb Type: 2 Needle
Crank Type: Dual Ball Bearing

  • Less weight but more thrust
  • 10 ounces lighter than the FA-120
  • Turns an APC 16×6 at 9,000 rpm
  • 13mm Muffler threads


Only Saito could put 1.25 cubic inches of power into a 1.00-size case. Not only is the FA-125 lighter and more powerful than the FA-120 it replaces, its unique size allows modelers to apply its awesome power to a wide variety of airplane sizes. It will work with anything from .90-size sport aerobats all the way up to 1.20-size sport and IMAC planes. As with most Saito engines, the FA-125A is available in a stunning Golden Knight version with a gloss black finish and gold-plated valve covers.

With 10 fewer ounces and .05 more cubic inches than the FA-120 it replaces, the FA-125A gives new meaning to the term “escape velocity.” Just bolt one to the nose of Hangar 9’s ShowTime™ 90 and you’ll see what we mean.

You will need…

Propeller:  16×6


Saito Small to Medium Single Cylinder Engine Manual