O.S. FSa-72II Airplane Engine with F-5030 Silencer

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O.S. FSa-72II Airplane Engine with F-5030 Silencer
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Price: $619.99

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Carb TypeO.S. 61N rotary, 2-needle, extended intake tube
Height4.2 in (108 mm) bottom of crankcase to top of rocker cover
Muffler Type2-piece aluminum
Muffler Weight1.9 oz (54g)
Plug TypeO.S. type F
Crankshaft ThreadsUNF1/4-28
Recommended Fuel4-stroke blend, 10%-20% nitro
Total Weight1.2 lbs (530g)
Engine (Only) Weight16.79 oz (476 g)
Displacement0.719 cu in (11.79cc)
Bore1.063" (27mm)
Length4.1" (103.6mm) from carb to drive hub
Prop Range12x7-8 - 14 x 6-7
RPM Range2,400 - 12,000 rpm
Stroke0.811 in (20.6 mm)
Width1.8" (45mm) at mounting tabs
HP1.2PS, 1.18 HP @ 12,000 rpm
Type4-stroke glow powered .72 cu in airplane engine
Crankshaft TypeThreaded

This product was added to our catalog on September 6, 2018

Michael Morgan
Verified Owner
Thursday, Jul 28 2022 (about a year ago)
O.S. FSa-72II Airplane Engine with F-5030 Silencer
This is a gorgeous engine and Mr Ogawa would be proud to see that his company still produces state of the art products.
The power this engine produces compared to when I first ran an OS 70 4 stroke some years ago is amazing. 4 Stroke engineering has really hit it's peak. Designed to be started using and electric starter, but fires up on first flip by hand if you desire. Idles forever and transition to full speed is smooth. No vibration to speak of.
Hats off to Amain as well as the proposed shipping and delivery was less than half the time expected.