120AX
Perfect for 3D, precision and sport flying!
It's a fantastic way to ratchet up horsepower for more flying fun! The 120AX, which boasts 20% more displacement than a .91, can turn bigger props with ease, resulting in improved 3D, precision and sport flying. Boost your plane's performance, without compromising weight — bolt in a 120AX and see the difference for yourself!
- Delivers 20% more power than a .91.
- At 21 ounces, the 120AX is a very minimal weight increase over a .91.
- The new angular head design not only looks great, it significantly increases surface area for better heat transfer.
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!
With the 120AX, there's no need to buy an expensive aftermarket muffler! The included Power Box™ muffler comes with two adapters — one of which turns the muffler 90° to become a "Pitts style."
- Specifications
- Exploded Views
- Parts Listing
- Accessories
- Gallery
Stock Numbers:
OSMG0650 - with muffler
OSMG0651 - without muffler
Displacement: 1.20 cu in (20 cc)
Bore: 1.197 in (30.4 mm)
Stroke: 1.083 in (27.5 mm)
Practical rpm: 1,800-9,500
Output: 3.1 hp @ 9,000 rpm
Engine weight: 22.8 oz (647 g)
Muffler weight:
7.07 oz (219 g) with 90° adapter installed
7.91 oz (245 g) with extension installed
Includes: #8 glow plug, 70D dual-needle carburetor, E-5020 Power Box muffler w/two adapters
Recommended Props: 15x10-12, 16x8-10
OSMG0650 - with muffler
OSMG0651 - without muffler
Displacement: 1.20 cu in (20 cc)
Bore: 1.197 in (30.4 mm)
Stroke: 1.083 in (27.5 mm)
Practical rpm: 1,800-9,500
Output: 3.1 hp @ 9,000 rpm
Engine weight: 22.8 oz (647 g)
Muffler weight:
7.07 oz (219 g) with 90° adapter installed
7.91 oz (245 g) with extension installed
Includes: #8 glow plug, 70D dual-needle carburetor, E-5020 Power Box muffler w/two adapters
Recommended Props: 15x10-12, 16x8-10
Primary Accessories
| Stock Number | Mfr Number | Product Description | Quantity Needed |
| GPMQ4131 | GPMQ4131 | Great Planes Silicone Fuel Tubing Standard 3' | 1 |
| GPMQ4150 | GPMQ4150 | Great Planes Ultra Precision Fuel Filter | 1 |
| TOPQ5205 | TOPQ5205 | Top Flite 16x8 Power Point Propeller | 1 |
Field Equipment
| Stock Number | Mfr Number | Product Description | Quantity Needed |
| GPMP2012 | GPMP2012 | Great Planes Standard ProGlo Starter w/Charger | 1 |
| HCAP2550 | HCAP2550 | Hobbico 4-Way Wrench w/Plug Storage | 1 |
| HCAP3015 | HCAP3015 | Hobbico Hand-Crank Fuel Pump | 1 |
Optional Accessories
| Stock Number | Mfr Number | Product Description | Quantity Needed |
| DTXR0185 | DTXR0185 | Duratrax Engine Tuning Screwdriver | 1 |
| DTXR0187 | DTXR0187 | Duratrax Engine Tuning Tool | 1 |
| HCAP3105 | HCAP3105 | Hobbico Top Fueler MkIII | 1 |
| HCAP3107 | HCAP3107 | Hobbico Top Fueler MkIII Panel Ready | 1 |
| HCAP3300 | HCAP3300 | Hobbico TorqMaster 180 Heavy Duty 12 Volt | 1 |
| HCAP3305 | HCAP3305 | Hobbico Panel Ready TorqMaster 180 | 1 |
| HCAR0625 | HCAR0625 | Hobbico Long Nose Pliers 6" | 1 |
| OSMG2693 | 71605100 | O.S. #10 A5 Glow Plug Cold Air | 1 |
