TheePropulsion Navy Series delivers powerful, quiet, and eco-friendly electric propulsion for aluminum fishing boats, dinghies, daysailers, and cruising sailboats. Designed for both saltwater and freshwater, the Navy 3.0 and Navy 6.0 Evo offer a reliable, low-maintenance alternative to gas outboards—perfect for environmentally conscious boaters.

Equipped with direct-drive technology, these motors provide ultra-quiet operation and increased durability with fewer moving parts. The integrated hydrogeneration system allows your battery to recharge while under sail, extending time on the water and supporting a more sustainable boating experience.

Key Features:

High-efficiency electric propulsion for a wide range of boats
Direct-drive motor for quiet, low-vibration performance
Hydrogeneration to recharge batteries while sailing
Maintenance-free design with no gears or oil required
Freshwater and saltwater ready
Compatible with ePropulsion’s EVO remote and tiller controls

Specifications:

Navy 3.0 Evo

Power Output: 3 kW (equivalent to 6 HP)
Input Voltage: 39–60V
Motor Type: Brushless DC, direct-drive
Total Weight: 24.3 kg (53.6 lbs)
Recommended Battery: ePropulsion E80 or E175
Hydrogeneration: Yes
Control Options: EVO tiller / EVO side or top mount remote
Shaft Lengths: Short or long shaft available
Motor Efficiency:

Navy 6.0 Evo

Power Output: 6 kW (equivalent to 9.9 HP)
Input Voltage: 39–60V
Motor Type: Brushless DC, direct-drive
Total Weight: 36.6 kg (80.7 lbs)
Recommended Battery: ePropulsion E175 or dual E80s
Hydrogeneration: Yes
Control Options: EVO tiller / EVO side or top mount remote
Shaft Lengths: Short or long shaft available
Motor Efficiency:

Whether you're cruising in silence or powering through calm inlets, the ePropulsion Navy Series offers a modern, sustainable solution with class-leading technology and minimal maintenance.

Steps to Determine the Right Shaft Length

1. Measure Your Transom Height

The transom height is the vertical distance from the top of your boat's transom to the bottom of the hull. Use a measuring tape to obtain this measurement accurately.

2. Add the Propeller Radius

Consult your motor's user manual to find the radius of the propeller. For example, the Spirit 1.0 Evo has a propeller radius of approximately 5.5 inches (14 cm).

3. Add Clearance for Water Flow

Include an additional 4 inches (10 cm) to ensure proper water flow and prevent cavitation.

Calculation Example:

If your transom height is 21 inches:

Transom Height: 21 inches
Propeller Radius: 5.5 inches
Clearance: 4 inches

Total Required Shaft Length:

21 + 5.5 + 4 = 30.5 inches. In this case, a long shaft option (approximately 29.5 inches) would be suitable.

ePropulsion Shaft Length Options

Model	XS (in)	S (in)	L (in)
Spirit Series	20.7	24.6	29.5
Navy Series	N/A	25.0	29.9

Note: The Extra Short (XS) shaft is available only for the Spirit series.

Navy Outboards