Saito Engines FG-21 (1.26) 4-Stroke Gas Engine: BN

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This is the Saito Engines FG-21 (1.26) 4-Stroke Gas Engine. There are a lot of advantages to going with gas, like cleaner operation and cheaper fuel. But Saito 4-stroke gas engines give modelers more; namely some of the most impressive power-to-weight ratios in their class and the FG-21 is no exception. Based on the groundbreaking Saito FG-20, it packs 21cc’s of power into a 17cc case. Accompanying the extra displacement is the latest carb technology, updated exhaust valve seats and, of course, the sweet 4-stroke sound Saito engines are famous for.


  • Gasoline engine lowers operating costs as much as 90%
  • Latest carb technology makes for easier tuning and operating
  • 21cc displacement in a 17cc case
  • New valve seat design
  • New, smaller magnetic ignition system fits into tighter cowl installations
Type: 4-stroke
Displacement: 1.25 cu. in. (20.91 cc)
Bore: 1.26 in (32.0mm)
Stroke: 1.02 in (26.0mm)
Cylinders: Single
Total Weight: 31.2 oz (0.89 kg)
Engine (Only) Weight: 24.1 oz (0.69 kg)
Muffler Weight: 2.9 oz (83 g)
Crankshaft Threads: M8 x 1.25 mm
Benchmark Prop: APC 16 x 6 @ 8800 rpm
Prop Range: 15 x 8 to 16 x 8 2-blade; 14 x 9 to 15 x 7 3-blade
RPM Range: 2000-9500
Fuel: 20:1 gas to oil ratio; EVOX1001Q synthetic oil recommended
Muffler Type: Cast screw on
Cylinder Type: AAC
Carb Type: 2-needle Saito pumped carb

This product was added to our catalog on March 16, 2020