Sleipner SE40 Tunnel Thruster 12V
#1 in Under 45 kgfFull review
A strong value pick for a 26 to 34 ft boat: about $36 per kgf from a compact unit. Check that your battery bank can feed 315 A.
Amazon $1,450$1,450
3.5/5
The older Lewmar 140TT. Buy it only to replace an existing unit; the Gen 2 2.2 kW version gives 5 kgf more for about $225 more.
- 37 kgfThrust
- 2 kWMotor
- 12 VSupply
- 140 mmTunnel
Check price at Amazon$1,613.74
Price checked November 4, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- 37 kgf in a 140 mm tunnel
- Composite gearbox
- Lewmar parts are stocked widely
Cons
- Older 2.0 kW model that Lewmar replaced with the Gen 2 140TT 2.2 kW
- Lewmar does not publish a duty cycle for it
- No kit parts: control panel is extra
The Lewmar TT family
Every Lewmar TT model we rank, smallest first. Ratings compare each against its own thrust.
| Model | Thrust | Rating | Price |
|---|---|---|---|
| Lewmar 110TT Tunnel Thruster Kit | 28 kgf | 3.4/5 | $1,342.88 |
| Lewmar 140TT 2.0 kW Tunnel Thruster (this one) | 37 kgf | 3.5/5 | $1,613.74 |
| Lewmar 140TT 2.0 kW Thruster Kit | 37 kgf | 3.1/5 | $2,364.25 |
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its thrust. How we rank explains each one.
Specifications
| Model number | 140TT2.0 |
|---|---|
| Thrust | |
| Rated thrust | 37 kgf |
| Style | Tunnel |
| Propellers | Single |
| Electrical | |
| Supply | 12 V |
| Motor | 2 kW |
| Build | |
| Tunnel diameter | 140 mm |
| Weight | 13 kg (29 lb) |
Alternatives in this thrust
Sleipner SE30 Tunnel Thruster 12V
#2 in Under 45 kgfFull review
The cheapest way into a Sleipner tunnel thruster, for a small cruiser or runabout. Pick the SE40 if your boat is near the top of its length range.
Amazon $1,341$1,341
Lewmar 140TT 2.2 kW Gen 2 Thruster
#4 in Under 45 kgfFull review
The current Lewmar for a mid-size boat. Fine if you already have Lewmar controls; otherwise Sleipner is cheaper for the thrust.
Amazon $1,839.37$1,839.37
Compare
Compare the Lewmar 140TT 2.0 kW Tunnel Thruster with any other bow thruster →
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