The ePropulsion Navy Evo Series delivers powerful, quiet, 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 are a reliable, low-maintenance alternative to gas outboards for environmentally conscious boaters.

Both models use direct-drive technology for ultra-quiet operation and added durability with fewer moving parts, and an integrated hydrogeneration system that recharges your battery while under sail — extending time on the water. Connectivity through the ePropulsion app lets you monitor battery, speed, and range in real time.

Key Features

Two power levels — Navy 3.0 (3 kW, ~6 HP) and Navy 6.0 (6 kW, ~9.9 HP) for a wide range of boats.
Direct-drive motor — quiet, low-vibration performance with no gears or oil to maintain.
Hydrogeneration — recharges the battery while sailing.
Saltwater & freshwater ready — built for coastal and inland use.
EVO controls — works with ePropulsion EVO tiller or EVO side/top-mount remote (sold separately).
App connectivity — Bluetooth monitoring of battery level, speed, and remaining range.

How to Measure Your Transom Height & Choose Your Shaft Length

Picking the right shaft length is the single most important fitment decision on any outboard. It comes down to your boat's transom height — if the shaft is too short the propeller ventilates (sucks air) and loses thrust; too long and it adds unnecessary drag.

Measure your transom height. With the boat level, measure straight down from the top of the transom (where the motor clamps) to the bottom of the hull at the centerline.
Match it to the shaft length. As a general guide: a Short (S) shaft suits transoms up to about 15 in (38 cm); a Long (L) shaft suits transoms up to about 20 in (51 cm).
When you're between sizes, size up. A slightly long shaft runs fine; a too-short shaft will cavitate.

ePropulsion's own method adds the propeller radius and ~4 in (10 cm) of water-flow clearance to your transom height to get the total shaft length needed. The Navy Series offers a Short shaft of 25.0 in (635 mm) and a Long shaft of 29.9 in (760 mm).

Shaft option	Total shaft length	Fits transom up to
Short (S)	25.0 in (635 mm)	~15 in (38 cm)
Long (L)	29.9 in (760 mm)	~20 in (51 cm)

Specifications

Navy 3.0 Evo

Power output: 3 kW (equivalent to 6 HP)
Input voltage: 39–60 V
Motor type: brushless DC, direct-drive
Total weight: 53.6 lbs (24.3 kg)
Recommended battery: ePropulsion E80 or E175
Hydrogeneration: yes
Controls: EVO tiller / EVO side or top-mount remote
Shaft lengths: Short 25.0 in / Long 29.9 in

Navy 6.0 Evo

Power output: 6 kW (equivalent to 9.9 HP)
Input voltage: 39–60 V
Motor type: brushless DC, direct-drive
Total weight: 80.7 lbs (36.6 kg)
Recommended battery: ePropulsion E175 or dual E80s
Hydrogeneration: yes
Controls: EVO tiller / EVO side or top-mount remote
Shaft lengths: Short 25.0 in / Long 29.9 in

Warranty

The Navy Evo is covered by ePropulsion's 24-month limited warranty (from delivery to the first end customer) against defects in materials and workmanship under normal recreational use with proper installation and maintenance — free repair or replacement of defective parts. Commercial or professional use is not covered by the limited warranty (your local statutory warranty applies instead), and claims should be made within 6 months of discovering an issue.

Blue Marine is an authorized ePropulsion dealer — ships brand-new with ePropulsion's 24-month limited warranty, free shipping, and local pickup available.

Navy Outboards