Sleipner SE170 Tunnel Thruster 24V
#6 in Over 75 kgfFull review
For a 49 to 72 ft yacht with room for a 250 mm tunnel. It gives more thrust from less current than the SE150.
Fisheries Supply $7,063.30 eBay$7,063.30
The Sleipner SE170 Tunnel Thruster 24V is the better bow thruster overall, rated 3.6 to 3.0. The Sleipner SE170 Tunnel Thruster 24V leads on efficiency, value and weight. The Lewmar 185TT 6.0 kW Gen 2 Thruster costs $2,467.86 less ($4,595.44 vs $7,063.30).
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.
Lewmar 185TT 6.0 kW Gen 2 Thruster
#11 in Over 75 kgfFull review
The strongest 12 V Lewmar for a 185 mm tunnel. A 24 V boat is better served by a 24 V thruster that draws half the current.
Fisheries Supply $4,595.44 eBay$4,595.44
Which should you buy?
- Choose the Sleipner SE170 Tunnel Thruster 24V for efficiency (19.3 kgf per kW (170 kgf, 8.8 kW) vs 16.2 kgf per kW (97 kgf, 6 kW)), value ($41.55 per kgf ($7,063.30, 170 kgf) vs $47.38 per kgf ($4,595.44, 97 kgf)) and weight (3.9 kgf per kg (170 kgf, 44 kg) vs 3.6 kgf per kg (97 kgf, 27 kg)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every over 75 kgf bow thruster; a clear win is highlighted. How we rank explains each one.
| Factor weight | Sleipner SE170 Tunnel Thruster 24V | Lewmar 185TT 6.0 kW Gen 2 Thruster |
|---|---|---|
| Overall rating | 3.6/5 | 3.0/5 |
| Value 40% | 66 $41.55 per kgf ($7,063.30, 170 kgf) | 57 $47.38 per kgf ($4,595.44, 97 kgf) |
| Efficiency 25% | 76 19.3 kgf per kW (170 kgf, 8.8 kW) | 31 16.2 kgf per kW (97 kgf, 6 kW) |
| Run time 25% | 33 3 minutes continuous | 33 3 minutes continuous |
| Weight 10% | 62 3.9 kgf per kg (170 kgf, 44 kg) | 53 3.6 kgf per kg (97 kgf, 27 kg) |
Specifications
| Sleipner SE170 Tunnel Thruster 24V | Lewmar 185TT 6.0 kW Gen 2 Thruster | |
|---|---|---|
| Thrust | ||
| Rated thrust | 170 kgf | 97 kgf |
| Thrust at full supply voltage | 210 kgf | - |
| Style | Tunnel | Tunnel |
| Propellers | Twin | Single |
| Bow or stern use | Yes | - |
| Boat length | 49-72 ft | - |
| Electrical | ||
| Supply | 24 V | 12 V |
| Motor | 8.8 kW | 6 kW |
| Current draw | 550 A | 700 A |
| Continuous run | 3 min | 3 min |
| Build | ||
| Tunnel diameter | 250 mm | 185 mm |
| Weight | 44 kg (97 lb) | 27 kg (59 lb) |