Stinger 20cc Twin Gas Engine for RC Airplanes
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Stinger 20cc Twin Gas Engine
The Stinger 20cc Twin brings twin-cylinder operation to a compact gasoline engine for RC airplanes. With 20.5cc total displacement, a Walbro carburetor, and electronic CDI ignition, it is an option for builders who want a small twin in an aircraft with the space and mounting arrangement to accommodate it.
Stinger rates this two-stroke engine at up to 2.8 hp (2.1 kW). The manufacturer recommends 15 × 8, 16 × 8, and 17 × 6 two-blade propellers. Before ordering, check your aircraft’s firewall, cowl clearance, engine width, exhaust clearance, and propeller requirements.
Key Features
- Compact twin-cylinder, two-stroke gasoline RC airplane engine
- 20.5cc (1.25 cu in) total displacement
- Walbro carburetor
- Stinger electronic DC-CDI ignition with automatic timing advance
- Air-cooled cylinders
- Manufacturer-rated maximum output of 2.8 hp (2.1 kW)
- Mufflers, ignition module, and other installation hardware included as listed below
Manufacturer Specifications
| Model | Stinger 20cc Twin |
|---|---|
| Gator RC SKU | STNG-20-TWIN |
| Engine type | Twin-cylinder, two-stroke gasoline RC airplane engine |
| Total displacement | 1.25 cu in (20.5cc) |
| Bore × stroke | 1.08 × 0.67 in (27.6 × 17 mm), manufacturer listed |
| Maximum rated output | 2.8 hp (2.1 kW) |
| Manufacturer-listed speed range | 1,500–8,600 rpm |
| Manufacturer-listed idle speed | 1,800 rpm |
| Carburetor | Walbro |
| Ignition | Stinger electronic DC-CDI with automatic timing advance |
| Manufacturer-listed ignition power supply | 7.4–14V; verify the requirements of the ignition module supplied with your engine |
| Spark plug | 1/4-32 size or equivalent; verify against the plugs supplied with your engine |
| Recommended two-blade propellers | 15 × 8, 16 × 8, or 17 × 6 |
| Manufacturer-listed break-in propeller | 16 × 8 two-blade |
| Distance from cap to cap | 6.81 in (173 mm), manufacturer listed |
| Engine weight | Approx. 1.63 lb (740 g) |
| Cooling | Air-cooled |
Fuel and Ignition
This engine requires premixed gasoline and suitable two-stroke engine oil. Stinger’s current product listing recommends a 32:1 gasoline-to-oil mixture for conventional oil or 40:1 for synthetic oil. Follow the manual supplied with your engine for the applicable fuel mixture, break-in procedure, and adjustments.
Stinger lists a 7.4–14V ignition power supply and advises not powering the ignition through a BEC, iBEC, or uBEC. Check the ignition module supplied with your engine and confirm battery compatibility before connecting power.
What’s Included
- Stinger 20cc Twin engine
- Electronic CDI ignition module
- Mufflers
- Spark plugs
- Gaskets and bolts
- Throttle arm extension
- Engine manual
Additional Items Required
Gasoline, suitable two-stroke oil, a compatible ignition battery, and a suitable propeller are needed to operate the engine. Confirm your aircraft’s engine mounting, cooling airflow, and exhaust clearance before installation.
Replacement Parts
We carry Stinger 20cc engine parts, including options labeled Twin Gasket Set, Twin Reed Valve Assembly with Insulator, Twin Prop Hub Accessories, and Twin Muffler. For replacement plugs, see the Stinger spark plug listing and select 1/4-32 M8 Iridium; that listing identifies the 20cc Twin as compatible with this variant. We also carry a Walbro carburetor listed for the 20cc Twin. Check the selected part and your engine before ordering.
