Sleipner SE50 Tunnel Bow Thruster 12V
#2 in 45 to 75 kgfFull review
A mid-size bow thruster for a 26 to 36 ft boat. Buy the SE60 instead if you also want a stern thruster of the same family.
Amazon $1,700$1,700
The Sleipner SE50 Tunnel Bow Thruster 12V is the better bow thruster overall, rated 3.9 to 3.6. The Sleipner SE50 Tunnel Bow Thruster 12V leads on efficiency and weight. The Sleipner SE50 Tunnel Bow Thruster 12V costs $497.12 less ($1,700 vs $2,197.12).
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 185TT 3.0 kW Gen 2 Thruster
#5 in 45 to 75 kgfFull review
Lewmar’s mid-large thruster. It matches a Sleipner SE60 on thrust but costs about $300 more.
Amazon $2,197.12$2,197.12
Which should you buy?
- Choose the Sleipner SE50 Tunnel Bow Thruster 12V for efficiency (20.8 kgf per kW (50 kgf, 2.4 kW) vs 19.3 kgf per kW (58 kgf, 3 kW)) and weight (3.3 kgf per kg (50 kgf, 15 kg) vs 2.9 kgf per kg (58 kgf, 20 kg)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 45 to 75 kgf bow thruster; a clear win is highlighted. How we rank explains each one.
| Factor weight | Sleipner SE50 Tunnel Bow Thruster 12V | Lewmar 185TT 3.0 kW Gen 2 Thruster |
|---|---|---|
| Overall rating | 3.9/5 | 3.6/5 |
| Value 40% | 79 $34 per kgf ($1,700, 50 kgf) | 72 $37.88 per kgf ($2,197.12, 58 kgf) |
| Efficiency 25% | 98 20.8 kgf per kW (50 kgf, 2.4 kW) | 76 19.3 kgf per kW (58 kgf, 3 kW) |
| Run time 25% | 33 3 minutes continuous | 33 3 minutes continuous |
| Weight 10% | 44 3.3 kgf per kg (50 kgf, 15 kg) | 30 2.9 kgf per kg (58 kgf, 20 kg) |
Specifications
| Sleipner SE50 Tunnel Bow Thruster 12V | Lewmar 185TT 3.0 kW Gen 2 Thruster | |
|---|---|---|
| Thrust | ||
| Rated thrust | 50 kgf | 58 kgf |
| Thrust at full supply voltage | 62 kgf | - |
| Style | Tunnel | Tunnel |
| Propellers | Single | Single |
| Bow or stern use | No | - |
| Boat length | 26-36 ft | - |
| Electrical | ||
| Supply | 12 V | 12 V |
| Motor | 2.4 kW | 3 kW |
| Current draw | 370 A | - |
| Continuous run | 3 min | 3 min |
| Build | ||
| Tunnel diameter | 140 mm | 185 mm |
| Weight | 15 kg (33.1 lb) | 20 kg (43 lb) |