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  Saito 100 FA-AAC 4-Stroke Engine w/Muffler
Saito 100 FA-AAC 4-Stroke Engine w/Muffler

Our Price: $339.99

Product Code: SAIE100


This is the Saito FA-100 AAC 4-Stroke Engine with Muffler. The new Saito 100 out-performs the smaller 91, as well as the O.S. 91. These engine sound great, and they make the perfect powerplant for .60-size warbirds and sport planes. This engine has a 3-year warranty.

Super-Sized Power for Your .60-Size Plane
The FA-91 is one of the most popular selling engines in Saito's extensive line of four-strokes. The .91 fits perfectly into most airplanes designed for .60-size two-strokes offering the ability to swing larger diameter props with more thrust than the two-stroke. Many pilots simply prefer the powerful sound of a four-stroke. Now Saito™ is offering a new engine that offers even more power than the .91 but that's similar in size and weight.

Saito's new FA-100 will turn an APC 14 x 8 prop 300 to 700 rpm more than either the Saito .91 or O.S. .91. At only 19.2 ounces (less muffler), it weighs nearly 2 ounces less than the O.S as well! The Saito FA-100 is not just a punched out .91. It features a newly tooled case that shares the mounting dimensions of the O.S. 91. This allows it to be used with the many after-market engine mounts already available to fit this engine.

The Saito 100 idled and transitioned beautifully from the first start due to the included new Hangar 9™ Super Plug (HAN3011) that now comes with all Saito engines. This plug greatly improves idle and transition in all four-stroke engines. After a short slightly rich break-in, we peaked the needles at 3-5/8" out on the high-speed and a ¼ turn in from flush on the low-speed needle.

Our staff commonly uses 30% heli fuel in Saito engines, as it not only gives better top-end performance but it runs smoother, gives a better transition, and runs cooler.

In flight the FA-100 was one smooth operator. Transition and idle were clean and crisp with instantaneous response. No dead sticks occurred in the first six test flights, despite purposefully long high-altitude idles, followed by rapid full-throttle transitions. The 30% helicopter fuel gave a noticeable boost in power, plus the added oil in the fuel adds a nice trail of smoke.

If you're looking for a powerful lightweight four-stroke to power your latest .60 through .90-size project, you don't have to settle on a 91. Check out Saito's new FA-100.


  • Same mounting dimensions as O.S. 91 Surpass
  • 1.00-size in a .91-size case


Type: 4-stroke
Displacement: 1.10 cu in (17.10 cc)
Bore: 1.14 in (29.0 mm)
Stroke: 1.02 in (26.0 mm)
Cylinders: Single - Chrome Plated
Total Weight: 20.9 oz
Engine (Only) Weight: 19.5 oz
Muffler Weight: 1.4 oz
Crankshaft Threads: 8x1.25mm
Benchmark Prop: 14 x 8 APC
Prop Range: 13x9 - 14x10
RPM Range: 2,000 - 11,000
Fuel: 10%-30% Synthetic
Mounting Dimensions: 115 x 60 x 128 mm
Muffler Type: Cast
Cylinder Type: AAC
Carb Type: Barrel, 2 Needle Valve
Crank Type: Ball Bearing

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