The lowest price per kgf in the list and the best value for a 30 to 45 ft boat.
Amazon $1,893.23 eBayThe Vetus BOW7512D Bow Thruster 75 kgf rates 3.5 among 45 to 75 kgf bow thrusters; the Lewmar 185TT 5.0 kW Gen 2 Thruster rates 3.1 among over 75 kgf ones. The Vetus BOW7512D Bow Thruster 75 kgf costs $1,727.42 less ($1,893.23 vs $3,620.65).
Prices were last checked November 9, 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. As an eBay Partner, we may be compensated if you make a purchase.

A 12 V Lewmar for a boat of roughly 40 to 55 ft that needs more than the 185TT 4.0. A Sleipner SE80 costs less per kgf.
Fisheries Supply $3,620.65 eBayScores side by side
These two sit in different thrust classes (45 to 75 kgf and over 75 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 BOW7512D Bow Thruster 75 kgf | Lewmar 185TT 5.0 kW Gen 2 Thruster |
|---|---|---|
| Overall rating | 3.5/5 | 3.1/5 |
| Value 40% | 99 $25.24 per kgf ($1,893.23, 75 kgf) | 62 $44.15 per kgf ($3,620.65, 82 kgf) |
| Efficiency 25% | 44 17 kgf per kW (75 kgf, 4.4 kW) | 34 16.4 kgf per kW (82 kgf, 5 kW) |
| Run time 25% | 0 2 minutes continuous | 33 3 minutes continuous |
| Weight 10% | 65 3.9 kgf per kg (75 kgf, 19 kg) | 35 3 kgf per kg (82 kgf, 27 kg) |
Specifications
| Vetus BOW7512D Bow Thruster 75 kgf | Lewmar 185TT 5.0 kW Gen 2 Thruster | |
|---|---|---|
| Thrust | ||
| Rated thrust | 75 kgf | 82 kgf |
| Style | Tunnel | Tunnel |
| Propellers | Single | Single |
| Bow or stern use | Yes | - |
| Boat length | 30-45 ft | - |
| Electrical | ||
| Supply | 12 V | 12 V |
| Motor | 4.4 kW | 5 kW |
| Current draw | 500 A | 480 A |
| Continuous run | 2 min | 3 min |
| Build | ||
| Tunnel diameter | 185 mm | 185 mm |
| Weight | 19 kg | 27 kg (59 lb) |