Momentum U2 Portable Electric Outboard Motor
The Lightweight Heavyweight
2.5 kW Performance. 37.5 lb Portability.
(5 HP Gasoline Equivalent)
Power Without the Penalty.
The Momentum U2 2.5kW Portable Electric Outboard ends the compromise between weight and power. For years, portable electric outboards forced a choice: carry a light 1 kW motor that struggles in the tide, or a heavy 3 kW system that requires two people to mount. The Momentum U2 ends the compromise. By delivering 2.5 kW of continuous power in a sub-40 lb frame, we’ve created the ultimate power-to-weight ratio for the modern boater.
Why kW Matters: Unlike “peak” or “boost” ratings that fade when you need them most, the U2 provides 2.5 kW of sustained thrust. Whether you are fighting an outgoing tide or pushing a 2,500 lb sailboat, the U2 delivers the torque to get you home.
The Power Density Battle: Momentum U2 vs. ePropulsion Spirit 2 & Torqeedo Travel XP
| Momentum U2 | Spirit 2 | Travel XP |
|---|---|---|
| 67 Watts per Pound | 44 Watts per Pound | 33 Watts per Pound |
The Verdict: The U2 delivers nearly double the power density of the competition.
More Muscle. Less Mass. Zero Compromise.
Key Features
Key features designed for versatility, safety, and performance.
Integrated Trip Computer with Battery
Safety
Multi Position Mount
Applications
Discover the wide-ranging uses of Momentum’s electric outboard motor in marine propulsion systems.
Tenders
Light-weight and easy mounting even when in the water. No exhaust fumes, quiet and safe to operate. Perfect for tenders on daily ferry or utility transport mission.
Sail Boats
Suitable for sailing vessels up to 26ft, light and compact enough for one person to stow it away on board or bring it home with you. Maintenance-free and no hassle with fuels.
Explorers
Built for explorers. This 5HP-equivalent powerhouse turns any kayak or canoe into an expedition vessel; light enough for solo portage, yet strong enough for load hauling.
Technical Specifications
| Max Input Power | 2.5kw |
| Shaft Length | Short Shaft (15in), Long Shaft (20in) |
| Prop diameter | 9.8in |
| No. of blades | 2 |
| Cooling system | 100% external passive seawater |
| Battery | 1.4 kWh Battery with Integrated Trip Computer |
| Weight | 37lbs |
Performance
Ezraft Q360
| Speed/KTS | Endurance / Hrs | Distance Travelled |
|---|---|---|
| 3.0 | 18.3 | 55 |
| 4.0 | 3.3 | 13 |
| 5.0 | 1.5 | 7 |
| 9.0 | 0.6 | 6 |
Dimensions & Weight
Short Stem
Long Stem
Dimensions: 39cm
Weight: OBM + Prop: 17kg
Mount: 2kg
Dimensions: 52cm
Weight: OBM + Prop: 17.5kg
Mount: 2kg
Frequently Asked Questions – FAQ
What is the power output of the Momentum U-2?
The Momentum U2 has a maximum continuous output of 2.5kW (2500W).
Is the battery integrated?
Yes. The U-2 features a detachable, waterproof, and removable 1.4 kWh high-power battery (48V Lithium-ion). It includes an integrated trip computer with a GPS speed and range display.
How much does Momentum U2 weigh?
The U-2 is designed for ultimate portability:
- Motor weight: ~20 lbs (9 kg)
- Battery weight: ~17.6 lbs (8 kg)
- Total weight: ~37.6 lbs (17 kg)
What shaft lengths are available for Momentum U2?
The U-2 comes in two standard sizes:
- Short Shaft: ~15 inches (39 cm)
- Long Shaft: ~20.5 inches (52 cm)
Which shaft length should I select?
-Select the shaft length your boat manufacturer recommends. When in doubt, choose the long shaft. The long shaft offers flexiability without noticable performance penanty. Electric-Marine.com also recommends purchasing the optional, bolt-on anti-ventilation plate when using the short shaft.
What is the expected range and performance for the Momentum U2?
Performance varies by vessel (based on a single person in calm conditions):
- Ezraft Q360: Max distance of 55 NM at 3.5 mph (3 knots).
- Takacat T300LX: Max distance of 29 NM at 3.5 mph (3 knots).
- Highfield Classic 310: Max distance of 23 NM at 3.5 mph (3 knots).
- Top Speed: Up to 10.4 mph (9 knots) depending on the boat.
Does the Momentum U2 have built-in GPS?
Yes, the U2 includes a GPS receiver to display Speed Over Ground and calculate remaining range.
Is the passive cooling of the Momentum U2 sufficient for warm tropical waters?
The Momentum U2 electric outboard motor was developed in Singapore, where 80% of our testing was performed in the warm Singapore waters. We are confident that the U2’s passive cooling system ensures the motor runs reliably in any tropical waters.
