The Mercury 20HP EFI (20EH) is the ultimate lightweight powerhouse for boaters who demand effortless operation and high-torque performance. Featuring a sophisticated Electronic Fuel Injection (EFI) system and Electric Start convenience, this 333cc twin-cylinder engine ensures turnkey reliability in all weather conditions. With its 15-inch short shaft and integrated alternator for battery charging, the 20EH is the ideal power choice for aluminum fishing boats, soft-bottom inflatables, and utility skiffs.
Technical Specifications
| Model Number / MPN |
20EH |
| Horsepower |
20 HP (14.7 kW) |
| Shaft Length |
15 Inches (Short Shaft) |
| Engine Type |
Inline 2-Cylinder / 4-Stroke SOHC |
| Displacement |
333 cc (20.3 cubic inches) |
| Starting System |
Electric Start (with Manual Backup) |
| Alternator Output |
12-Amp (145 Watts) |
| Dry Weight |
Approx. 103 lbs (47 kg) |
Effortless Power, Superior Control
- Electric Start System: Provides quick, hassle-free ignition at the push of a button, complemented by a manual recoil for secondary backup.
- Battery-Free EFI: Ensures turnkey starting, stable idling, and crisp acceleration regardless of altitude or fuel quality—even without a battery.
- High-Output Alternator: A 12-Amp charging system keeps your starting battery topped up to power your sonar, livewells, and lighting.
- Ambidextrous Tiller Control: Center-mounted tiller with adjustable steering friction and ergonomic throttle for comfortable one-handed operation.
- Mercury 4-Front Corrosion Protection: Advanced multi-layer paint and marine-grade alloys protect the 20EH in the most demanding saltwater conditions.
Professional Grade Performance
The Mercury 20EH is built for boaters who prioritize simplicity and luxury. Its high-displacement 333cc powerhead delivers superior low-end torque to get your boat on plane quickly while maintaining the silent, smoke-free operation that Mercury FourStrokes are known for. Featuring a maintenance-free valve train and an easy-access oil drain system, this 20HP EFI is engineered for a low cost of ownership and maximum time on the water.
Frequently Asked Questions
1. Is a battery required to use this motor?
While the EFI system can operate "battery-free" for manual starting, a 12V battery is required to utilize the Electric Start and onboard charging features.
2. Does it include a fuel tank and line?
Yes. This model comes standard with a 3.2-gallon (12L) external fuel tank and the required fuel line with quick-connect fittings.
Marine Equipment Specialist | Genuine Provider | Genuine Mercury Parts & Accessories
