Introducing Epropulsion Spirit 1.0 Plus Electric Outboard
Spirit 1.0 Plus is a portable 3HP electric outboard made for dingies, fishing boats, sailboats and tenders. It features a 1276Wh large integrated lithium battery for long range. It’s nimble, lightweight, and clean power.
At the core of Spirit 1.0 Plus electric outboard motor, it’s a 1kW BLDC motor, equivalent to 3HP.
||Speed (mph / kph)
||Range (mile / km)
||2.2 / 3.5
||80 / 129
||2.7 / 4.3
||53 / 85.3
||3.5 / 5.6
||35 / 56
||4.4 / 7.1
||22 / 35.5
||5.3 / 8.5
||13.3 / 21.3
||5.7 / 9.2
||9.5 / 15.3
||6.2 / 10
||7.8 / 12.5
* The performance data is based on a 12-foot aluminum boat with one person and one Spirit battery Plus in calm lake water. The actual speed, range and running time may vary because of different boats, load, weather, etc.
Electric outboard motors are easy to operate and keep you informed of operation status.
You have access to real-time power, remaining runtime, battery level, operating voltage, etc.
Press one button and you’re ready to go. No more tiring pull cord start.
Magnetic Kill Switch
Stop the motor in an emergency and keep you safe.
Stepless throttle changing
The throttle hand feel is clear, smooth and enjoyable.
Max Power Output Adjustment
With a smaller full throttle power, it’s safer for kids and rental boat
Turning throttle easily either from the left-hand or right-hand side.
||Spirit 1.0 Plus
||1 kW (3HP equivalent)
||39V – 60V
||Spirit Battery Plus, 1276 Wh li-ion polymer
||10.6 kg / 23.4 lbs
||8.7 kg / 19.2 lbs
||Standard charger: 8.5 Hrs Fast charger: 3.5 Hrs
||Yes, and E-Series Battery recommended
||11″ × 5.8″ 2-blade composite propeller
|Trim / Tilt Angle
||0°, 7°, 14°, 21° / 70°
||Extra Short, Short, Long
||Brushless DC motor
* The weight is measured with the short shaft version.
How to Find Your Shaft Length
If you are looking for an ePropulsion electric outboard for your boat, choosing the correct shaft length is important. If you go too long it would still work but it may lack performance. You will also risk hitting bottom or submerged objects more frequently such as rocks. If you go too short, that’s the worst scenario as you‘re more than likely going to cavitate.
Please note that ePropulsion has a different shaft length measurement from gas-powered outboards. For electric outboards, the shaft length is measured from the top of the clamp bracket to the center of the propeller. For gas outboards, it’s measured from the top of the clamp bracket to the anti-ventilation plate.
As you can see, our XS is close to S from Mercury. Our S is close to L from Mercury. Our L is longer than L from Mercury. See below.
To find the suitable shaft length, the principle is to make sure the top of the propeller is matched to the lowest point of the transom with at least an extra 10 cm (4’’) space to ensure good water flow underneath the boat.
Hard to put it into practice? Well, in order to get the right outboard shaft length, follow three easy steps blow:
Step 1: Measure the transom height which is the length from the top of the boat transom to the bottom of the boat, as illustrated in the image below:
Step 2: After you get the transom height, add the radius of the propeller (check the user manual, and then technical drawing for the number) to calculate the minimum shaft length needed to make it work.
Step 3: Add another 10 cm (4’’) to the previous calculation for the final ideal shaft length.
Let’s take the Spirit 1.0 Evo Remote, radius of whose propeller is 5.5’’ as shown in the technical drawing, for an example. To match the 1964 16′ Starcraft aluminum boat with 21’’ transom height, the shaft length is supposed to be calculated as the following:
So the long shaft outboard motor should be the best choice according to the shaft options available:
Spirit Series Products
||52.5 cm / 20.7 inches
||62.5 cm / 24.6 inches
||75 cm / 29.5 inches
Navy Series Products
||63.4 cm / 25 inches
||75.9 cm / 29.9 inches
To make things easy for you, here is a chart to match the ePropulsion outboard shaft length with the transom height directly for your quick reference:
Shaft Length Recommendation
|30 cm / 11.8 inches – 40 cm / 15.7 inches
|40 cm / 15.7 inches – 50 cm / 19.7 inches
|Higher than 50 cm / 19.7 inches
* Extra short version is available for Spirit series only. The navy series doesn’t have an XS shaft.
* This shaft length chart is for your reference only. The calculation from steps above would be more reliable if you get conflicting results.
This chart gives you a general idea of how to choose the outboard shaft length according to the transom height of your boat. To be more specific:
- For most small dinghies and aluminum boats under 15ft or 4.5m, extra short shaft or short will work depending on whether the transom height is over 40 cm / 15.7 inches or not.
- For boats with the transom height higher than 50 cm / 19.7 inches, a long shaft version is more suitable.
There are also extra tips if you are using daysailers, one-design racing sailboats, sport boats, and other sailing boats:
- For daysailers and short one-design racing sailboats, the ideal outboard shaft length depends on the position of the outboard mount. If you choose Spirit 1.0, we suggest you keep the outboard mount at a lower position to make the XS shaft length work. That’s because XS takes less space to store inside the cabin.
- For daysailers, sports boats and other sailing boats it’s best to measure the distance from the water line to the top of your outboard mount.
It’s always worth checking with your local dealer on which shaft length they recommend for your boat and local conditions. If you still have any questions regarding the shaft length, don’t hesitate to leave a message to our official Facebook.