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3.4 out of 5 Customer Rating

120AX Ringed 1.20 Airplane Glow Engine with Muffler

Item No. OSMG0650
Brand Logo
3.4 out of 5 Customer Rating

120AX Ringed 1.20 Airplane Glow Engine with Muffler

Item No. OSMG0650
$299.99 Price reduced from $479.99 to
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Product Details

Perfect for 3D, precision and sport flying!

Admit it: if you could ratchet up horsepower without having to increase the mounting space, you’d probably jump at the chance. Well, here it is. The 120AX boasts 25% more displacement than a .91 (think of the bigger props you can swing!) — and bolts into the same space, with almost no extra weight. And that’s not all. The 120AX’s innovative Power Box muffler offers mounting versatility that translates into value. Plus, the angled heat sink head not only looks sharp, it adds more surface area, for better cooling. Here’s a golden opportunity to boost your airplane's flying capabilities — with almost no modification!


O.S. Engines two year limited warranty
O.S. 120AX Ringed w/Muffler - Muffler
With the 120AX, there’s no need to buy an expensive aftermarket muffler!
O.S. 120AX Ringed w/Muffler - Power Box
The included Power Box comes with two adapters — one of which turns the muffler 90° to become a “Pitts style“.
O.S. 120AX Ringed w/Muffler - 1.20 Size
With the 120AX and .91 side by side, you can see how they’re virtually identical in size — but you’ll enjoy a big difference in performance!

Product Specifications

Specs

Displacement 1.218 cu in (19.96 cc)
Engine (Only) Weight 20.88 oz (647 g)
Power Type Glow
HP 3.1 PS, 3.06 HP @ 9,000 RPM
Muffler Type 2-piece aluminum
Muffler Weight 7.07 oz (219.2 g) w/90 deg adapter installed, 7.9 oz (245 g) w/extension installed
Oil Type & Content At least 18% synthetic lubricant
Plug Type O.S. #8
Product Height 4.3" (109.2mm) bottom of crankcase to top of cylinder head
Product Length 3.9" (100.2mm) from back plate to front of drive hub
Product Width 2.6" (67mm) at mounting tabs
Prop Range 15 x 10-12 or 16x8-10
Recommended Fuel 5%-20% two stroke blend nitromethane
RPM Range 1,800 - 9,500 RPM
Stroke 1.083" (27.5mm)
Crankshaft Threads UNF5/16-24
Crankshaft Type Threaded
Cylinders Single
Bore 1.197" (30.4mm)
Carb Type O.S. 70D rotary