The Mercury 20hp EFI (20MH) brings high-tech performance to the portable outboard category. Featuring a revolutionary battery-free Electronic Fuel Injection (EFI) system, this 333cc twin-cylinder engine delivers immediate throttle response, exceptional fuel economy, and reliable manual starting without the need for a cranking battery. With its 15-inch short shaft and lightweight design (99 lbs), the 20MH is the ultimate power choice for aluminum fishing boats, soft-bottom inflatables, and utility skiffs.
Technical Specifications
| Model Number / MPN |
20MH |
| 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 |
Manual Recoil Start (EFI) |
| Full Throttle RPM |
5700 - 6200 RPM |
| Dry Weight |
Approx. 99 lbs (45 kg) |
Compact Power, Advanced Engineering
- Battery-Free EFI: Provides turnkey manual starting and smooth idling regardless of temperature or altitude—no battery required.
- Ambidextrous Tiller Handle: An innovative center-mounted tiller that can be adjusted for left or right-hand operation with ergonomic controls.
- Low Vibration Design: Features a balanced powerhead and advanced rubber mounts to minimize noise and handle vibration for all-day comfort.
- Drip-Free Oil Change: Includes a convenient oil drain system and a filter layout designed for easy, mess-free maintenance.
- Multiple Trim Positions: 6 tilt positions plus shallow-water drive settings allow for effortless navigation in varying water depths.
Lightweight Performance Without Compromise
The Mercury 20hp EFI (20MH) is built to be the hardest working portable motor on the water. Its high-displacement 2-cylinder architecture delivers superior torque for quick hole shots, even with a heavy fishing load. Protected by Mercury’s 4-Front Corrosion system and built with premium marine-grade alloys, the 20MH is engineered to survive the toughest saltwater and freshwater environments. For boaters who want a reliable, simple-to-maintain, and fuel-efficient outboard, the 20MH is the industry benchmark.
Frequently Asked Questions
1. Does this EFI model require a battery to start?
No. The 20MH features battery-free EFI technology. It generates enough power to run the fuel system during the first few inches of the pull-start.
2. What is the fuel tank capacity included?
This unit comes with a standard 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
