Stinger Pro 125cc Twin Gas Engine with Back Starter & ESC
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Stinger Pro 125cc Twin Gas Engine with Back Starter & ESC
The Stinger Pro 125cc Twin is a horizontally opposed, two-stroke gasoline engine for large-scale RC airplanes. This version features a back-mounted electric starter and includes an electronic speed controller (ESC) for the starter. The twin-cylinder layout delivers the distinctive sound and smooth operation sought by large-scale aircraft pilots.
Check the starter location before ordering: This is the back-starter model. Stinger also makes a separate front-starter version. Allow room for the starter behind the engine when planning your aircraft installation.
Engine specifications
| Engine type | Horizontally opposed, two-cylinder, two-stroke gasoline engine |
|---|---|
| Displacement | 125 cc |
| Bore | 1.85 in. (47 mm) |
| Maximum output | 13 hp, manufacturer specification |
| Operating speed range | 1,500–9,000 rpm |
| Recommended two-blade propellers | 27×8, 27×10, 27×11, 28×8, 28×10, or 28×12 |
| Starter configuration | Back-mounted electric starter |
| Starter controller | ESC included |
| Carburetor | Walbro |
| Ignition | Stinger DC-CDI electronic ignition with automatic advance |
| Ignition supply | 7.4–14 V; follow the supplied ignition instructions for battery selection and wiring |
| Spark plugs | Two NGK CM6-type spark plugs |
| Cooling | Air cooled |
| Gator RC SKU | STNG-125-TWIN-AS |
What's included
Stinger Pro 125cc twin engine with back-mounted electric starter, starter ESC, electronic CDI ignition, mufflers, spark plugs, gaskets, bolts, throttle arm extension, and manual. Verify the contents of your particular boxed engine against its packing list.
What you'll need
- A suitable propeller from the manufacturer's recommended range
- Gasoline and suitable two-stroke oil
- Ignition battery and appropriate starter power setup
- Fuel system and installation hardware appropriate for your aircraft
Installation note: The ignition's published voltage range should not be assumed to specify the starter ESC's battery requirements. Follow the instructions supplied with each component. Confirm rear-starter and muffler clearance in your aircraft before installation.
Replacement parts
- Shop Stinger 125cc engine parts, including available gasket, reed valve, prop hub accessory, and Pro muffler options.
- Shop Stinger replacement spark plugs. Select the SCM-6 Iridium option listed for the 125cc Twin; the 1/4-32 option is for other engines.
Fuel and break-in: Use premixed gasoline and suitable two-stroke oil. Follow the manual supplied with your engine for its oil ratio and break-in procedure.
