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 eBayThe Lewmar 185TT 5.0 kW Gen 2 Thruster rates 3.1 among over 75 kgf bow thrusters; the Lewmar 185TT 4.0 kW Gen 2 Thruster rates 3.0 among 45 to 75 kgf ones. The Lewmar 185TT 4.0 kW Gen 2 Thruster costs $520.66 less ($3,099.99 vs $3,620.65).
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The strongest 12 V Lewmar in this list. It costs about $48 per kgf; a Vetus BOW7512D gives more thrust for about $1,000 less.
Amazon $3,099.99 eBayScores side by side
These two sit in different thrust classes (over 75 kgf and 45 to 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 | Lewmar 185TT 5.0 kW Gen 2 Thruster | Lewmar 185TT 4.0 kW Gen 2 Thruster |
|---|---|---|
| Overall rating | 3.1/5 | 3.0/5 |
| Value 40% | 62 $44.15 per kgf ($3,620.65, 82 kgf) | 56 $47.69 per kgf ($3,099.99, 65 kgf) |
| Efficiency 25% | 34 16.4 kgf per kW (82 kgf, 5 kW) | 32 16.2 kgf per kW (65 kgf, 4 kW) |
| Run time 25% | 33 3 minutes continuous | 33 3 minutes continuous |
| Weight 10% | 35 3 kgf per kg (82 kgf, 27 kg) | 42 3.2 kgf per kg (65 kgf, 20 kg) |
Specifications
| Lewmar 185TT 5.0 kW Gen 2 Thruster | Lewmar 185TT 4.0 kW Gen 2 Thruster | |
|---|---|---|
| Thrust | ||
| Rated thrust | 82 kgf | 65 kgf |
| Style | Tunnel | Tunnel |
| Propellers | Single | Single |
| Electrical | ||
| Supply | 12 V | 12 V |
| Motor | 5 kW | 4 kW |
| Current draw | 480 A | - |
| Continuous run | 3 min | 3 min |
| Build | ||
| Tunnel diameter | 185 mm | 185 mm |
| Weight | 27 kg (59 lb) | 20 kg (43 lb) |