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Saito FG-21 4C Gas Elec/Ign W/Mount

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Product Features

  • The FG-21 runs with any good quality forecourt petrol, mixed 20:1 with oil.
  • 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.

Product Description

There are a lot of advantages to going with Petrol, like cleaner operation and cheaper fuel. But Saito 4-stroke Petrol engines give modelers more; namely some of the most impressive power-to-weight ratios in their class. The new 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.


  • Bore: ø32.0mm
  • Stroke: 26.0mm
  • Stroke Volume: 20.91cc
  • Weight: Body: 690g/Muffler: 83g/Ignition System: 113g/Mount: 156g
  • Practical RPM: 2,000 ~ 9,500
  • Fuel: Petrol(Gasoline): Oil = 20:1 (Volume Ratio)
  • Fuel Flow: Approx 15cc/min (at full throttle, approx 8,800 rpm) Fuel flow variess depends upon propeller load. More fuel flow with larger load and less fuel with smaller (In actual flight, fuel flow somewhat increases.
  • Recommended Prop: 15 x 8 ~ 16 x 6in
  • Static Thrust: 3~4kgf (8,800RPM)
  • Our shipping times are typically 24-48hrs from ordering during normal business hours.
  • We use a Courier and Australia post as our agents.  Please allow typical delivery times for your area.
  • International shipping is priced per country, please check your cart before ordering.
  • We are unable to ship Dangerous goods overseas. 
  • We are also limited by length of some parcels. Anything over 1.05m will need a specialist courier quote which we can provide.
  • When adding items to your cart you can get a quote for shipping first before commiting to the order.

Customer Reviews

Based on 2 reviews
Richard Herbert
A jewel of an engine

Beautifully made, smooth running and a compact engine for its capacity. I love the lack of oil residue and the low cost and availability of petrol over glow.

Timothy Reid
Saito FG21

Thanks for your help, love it runs well