Vetus BOW4512D Bow Thruster 45 kgf
#7 in 45 to 75 kgfFull review
A solid, well supported thruster for a 26 to 37 ft boat, but you pay about $390 more than Sleipner for similar thrust.
Amazon $1,836.41$1,836.41
The Vetus BOW4512D Bow Thruster 45 kgf rates 3.3 among 45 to 75 kgf bow thrusters; the Lewmar 140TT 2.0 kW Thruster Kit rates 3.1 among under 45 kgf ones. The Vetus BOW4512D Bow Thruster 45 kgf costs $527.84 less ($1,836.41 vs $2,364.25).
Prices were last checked November 4, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Lewmar 140TT 2.0 kW Thruster Kit
#6 in Under 45 kgfFull review
The 140TT 2.0 kW sold as a kit. Compare it against buying a Gen 2 unit and a panel separately.
Amazon $2,364.25$2,364.25
Scores side by side
These two sit in different thrust classes (45 to 75 kgf and under 45 kgf), and each is scored against the reference points for its own class, so a rating says how well each does among its own thrust peers. How we rank explains each factor.
| Factor weight | Vetus BOW4512D Bow Thruster 45 kgf | Lewmar 140TT 2.0 kW Thruster Kit |
|---|---|---|
| Overall rating | 3.3/5 | 3.1/5 |
| Value 40% | 67 $40.81 per kgf ($1,836.41, 45 kgf) | 37 $63.90 per kgf ($2,364.25, 37 kgf) |
| Efficiency 25% | 14 15 kgf per kW (45 kgf, 3 kW) | 64 18.5 kgf per kW (37 kgf, 2 kW) |
| Run time 25% | 67 4 minutes continuous | 50 run time not published (neutral score used) |
| Weight 10% | 50 weight not published (neutral score used) | 28 2.8 kgf per kg (37 kgf, 13 kg) |
Specifications
| Vetus BOW4512D Bow Thruster 45 kgf | Lewmar 140TT 2.0 kW Thruster Kit | |
|---|---|---|
| Thrust | ||
| Rated thrust | 45 kgf | 37 kgf |
| Style | Tunnel | Tunnel |
| Propellers | Single | Single |
| Bow or stern use | Yes | - |
| Boat length | 26-37 ft | - |
| Electrical | ||
| Supply | 12 V | 12 V |
| Motor | 3 kW | 2 kW |
| Current draw | 300 A | - |
| Continuous run | 4 min | - |
| Build | ||
| Tunnel diameter | 125 mm | 140 mm |
| Weight | - | 13 kg (29 lb) |