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VETUS · tunnel thruster · bow
VETUS Bow Pro 304: specs, price and the boats it fits
It gives 66 lb (30 kgf) of push. VETUS sells it for boats of up to 24 ft. It runs on 48 V.
- Haul-out to install
- DIY 2 of 5: wiring prep only
- 3-year warranty
Not sold in the US right now. No US store or distributor lists the VETUS Bow Pro 304: we checked Defender, Fisheries Supply and Citimarine on 15 October 2026. Its specs and parts stay here for owners of boats built or bought abroad. For one to buy here, see the models on the VETUS thruster review that have a US price.
Quick stats
- Thrust 66 lb 30 kgf, VETUS's rating
- Boat length Up to 24 ft VETUS's own range
- Price per lb of thrust Not worked out It needs a price and a thrust figure
- Voltage 48 V As sold
- Battery at 48 V 60 Ah Four batteries, near the thruster
- Run limit 10 min At a stretch, the user manual's S2 rating
- To install it Haul-out The boat comes out of the water
- Anodes $68.62 A change. More than twice another maker's
About the VETUS Bow Pro 304
The Bow Pro 304 is the small BOW PRO built for boats that already run on 48 V, such as those with electric propulsion. It fits boats up to about 24 ft and gives 66 lb of finely controlled push, with a brushless motor and a joystick that sets how hard it pushes.
VETUS sells it by quotation through its dealers, so a dealer will price it for you. Besides the unit you’ll need the tube, a control panel, a main switch and fuses, which we put at about $419 to $911. It draws from a 48 V bank of four batteries in series, and those batteries, the cable and a charger come to about $1,813 to $1,874. See what else to buy.
Read more
On a 48 V boat the current stays low and the cables can be long and light. VETUS gives it the same 10-minute rating as the 12 V version. With no brushes to service, care comes down to a yearly zinc change, and dealer servicing keeps the three-year warranty.
The full spec sheet for a yard sits lower down, and the VETUS thruster review covers VETUS’s whole range.
Where this summary comes from (6 sources, read 12 October 2026)
- VETUS webshop, BOWA0304
- VETUS installation manual for the BOWA0304
- VETUS BOW PRO user manual 020810.04 (thrust not dependent on battery voltage; run time limited by the batteries)
- VETUS Maintenance and Warranty Manual for thrusters, 020901.02
- VETUS warranty policy (three years since 2011, claimed through the dealer)
- VETUS, Our Legacy (founded 1964, first bow thruster 1982, Yanmar Group 2013, BOW PRO 2018)
Will the VETUS Bow Pro 304 steer your boat?
26 FT TRAWLER · BOW · 15 KT WIND
Every knot figure here is wind speed, not boat speed or current.
On a 26 ft trawler the VETUS Bow Pro 304 (66 lb) steers her in an 18 knot breeze. Her bow needs about 45 lb from a tunnel to steer her in a 15 knot breeze.
The finder leaves it off her list. We found no US store that sells it, and the finder lists only units you can buy here.
The VETUS Bow Pro 304 on a trawler, by length
- 25 ft19 kt
- 30 ft16 kt
- 35 ft13 kt
- 40 ft12 kt
- 45 ft10 kt
- 50 ft9 kt
- 55 ft9 kt
- 60 ft8 kt
- 65 ft7 kt
- 70 ft7 kt
- 75 ft6 kt
- 80 ft6 kt
Outlined: the finder does not list it at that length (under 13 kt, far more than she needs, or outside VETUS’s own length range).
- Under 10 kt
- 10 to 15 kt
- 15 to 20 kt: the sweet spot
- Over 20 kt: more than she needs
Prices are the low end of the installed total, from our estimate. For your own boat, drive and installer, the finder prices each unit.
Is it right for your boat?
Every kind of boat it fits, by length
| Boat | Full thrust at 15 knots | Still a fit, in lighter wind |
|---|---|---|
| Pontoon & tritoon | Not listed. A pontoon has no hull body between the logs to bore a tunnel through, and nobody sells one for these boats. | |
| Sailboat | 23 to 26 ft | None |
| Houseboat | No length. Outside the maker's length range. | |
| Catamaran | No length. Outside the maker's length range. | |
| Trawler | 23 to 26 ft | None |
| Motor yacht | No length. Outside the maker's length range. | |
| Bass & flats | Not listed. Nobody sells a tunnel kit for these hulls, and a bass boat’s shallow planing bow has almost no depth to hold one. | |
| Wake & ski boats | Not listed. Nobody sells a tunnel kit for these hulls. | |
| Express cruiser | No length. More thrust than the boat needs. | |
| Center console | No length. More thrust than the boat needs. | |
The VETUS Bow Pro 304 against each kind of boat, in a 15 knot wind. Our sizing, from the finder’s own rules.
The first column is where one unit gives all the thrust the boat needs in 15 knots. The second is where the finder still lists it: the unit steers her in a 13 or 14 knot wind, within 15 percent of the 15 knot breeze this site sizes for. On a boat shorter than the first column’s shortest length, the unit is more than the boat needs.
How we size it
Our figure is the longest boat one unit can steer in a 15 knot wind. It is a range because each kind of boat catches the wind differently. Here every kind of boat it fits gets full thrust to 26 ft. The maker gives one range for every boat.
The table tries the VETUS Bow Pro 304 on each kind of boat, at every length that kind of boat is built in. The wind is 15 knots and the rules are the finder’s own. A length counts as a fit when the unit gives the thrust that boat needs at the bow and the maker lists it for that length.
A boat up to 10 percent past the maker’s range still counts here, as it does in the finder. So the table runs up to 26 ft, just past VETUS’s own range (up to 24 ft).
It is sized for two kinds of boat here. For your own boat, the finder gives an answer that also counts your drive and who does the installing. The compare page sets this unit beside others.
What it costs installed
No US dollar price is published for the VETUS Bow Pro 304, so we build no total for it. The yard’s share of the job is on the cost page.
The sizing and the costs on this page are estimates, for guidance only and without warranty. They are no quote, and nobody has inspected your boat. Check them against the maker’s manual and your yard before you rely on them. Terms of use.
DIY breakdown
DIY levels
- Level 5: Owner install. No yard, no electrician.
- Level 4: You install it, electrician connects. You mount and wire it; a marine electrician makes the final connections.
- Level 3: Split with the yard. The yard does the below-waterline part; you do the wiring.
- Level 2: Wiring prep only. The yard installs the unit and does the hull work; you do the wiring prep.
- Level 1: Yard job. A qualified professional does all of it.
You Yard Electrician. The bar is labor hours; a haul-out is a note.
How we rate DIYYou: 4 to 16 hours Yard: 32 to 70 hours Electrician: 2 to 4 hours Plus a haul-out.
Your part needs:Heavy battery cableCrimping big lugs
Every step, and who does it
- Cut, bond and fair the tunnel; fit the gear leg, motor and propeller Yard 32 to 70 hours The low end is two crew over two days, the job as owners describe it on the forums. The high end rises with boat length between two real billed figures: 32 hours at 35 ft, and the largest invoice we hold, 70 hours at 47 ft.
- Mount the battery box, switch and fuse holder; run and secure the cables You 4 to 16 hours Our estimate. No maker times this step, and a first-time owner is slower than a yard, so the range is wide.
- Final connections at the battery and the motor, load test Electrician 2 to 4 hours Our estimate. Nobody publishes a time for the final connections and test on their own.
A qualified marine electrician should make the final connections and test them before first use. Hours are labor only.
Related videos
Two from VETUS’s own channel and one from other channels. Each one is labeled. They play from YouTube only when you tap. Take any claim in a video back to the figures on this page, which are the ones we checked.
Know before you buy
What sets this model apart, what it costs to keep, and what to weigh.
Price per pound of thrust
There is no US price to divide by its thrust.
Controls
Proportional: the joystick sets how hard it pushes. The thruster fuse sits in the connection unit.
Pricey wear part: anodes
$68.62 a change- Zinc anode (SET0148): $68.62 at Fisheries Supply.
A change costs $68.62. That is over seven times the $9.00 for Sleipner’s anode on the same 110 mm tunnel (SM31180A, Defender). An anode is a plain block of metal that wears away by design, so you will buy it again.
They sit below the waterline, so a change means a haul-out or a diver.
Service and warranty
VETUS gives 3 years, or 1 for professional use, and it transfers to the next owner. Claims go through the dealer only. It is void unless an authorized VETUS dealer does the periodic maintenance, and transport, labor and lifting are excluded.
See VETUS’s warranty VETUS's warranty policy.Special mentions
Battery: at 48 V it wants four batteries of 60 Ah or more, VETUS's figure. The cheapest that meets it is the Optima BlueTop SC27DM Group 27 AGM, $359.99. Check your own bank.
Charger: a NOCO GEN5X2 two-bank shore charger, $146.41. It is the one our estimate prices.
Dealer prices at Fisheries Supply, read 26 October 2026.What to weigh
The boat comes out of the water to install it: it needs a tunnel bore below the waterline.
No US dollar price is published for it, so we can work out no installed cost.
Short pushes only: VETUS rates the motor for 10 min at a stretch.
Parts for the VETUS Bow Pro 304
See the VETUS Bow Pro 304 manualSearch for the number as printed here, with no spaces. Prices are each dealer’s on the day shown, before shipping and tax. Check the plate on your motor before you order: some parts change with the tunnel size, the voltage or the year.
For the install what the box leaves you to buy
The manual button above opens it on the maker's site. It has the hull, wiring and fuse figures for this model.
From VETUS’s BOW PRO 110 mm installation manual 020802.05 r7, December 2025, read 25 October 2026.
- In the box
- The manual prints no box list. It says the thruster is supplied with a zinc anode and has you drill with the template that comes with it. The thruster fuse sits in the connection unit.
- Bought separately
- The tunnel, the main switch (BATSW250 or BATSW600), the main fuse (ZE) and holder (ZEHC100), the cable, the control panel and its cable.
- Charging
- The manual wants the thruster on its own battery or batteries, close by so the power cables stay short, and sealed batteries if they share its compartment. Its wiring diagram shows an alternator and a battery separator, and it says nothing more about charging.
The manual’s words, page 22: “We also recommend that each bow thruster is powered by its own separate battery or batteries.”
A yard job adds these parts on top of the unit: $419 to $911 for the priced ones, at Fisheries Supply’s prices on 30 September 2026 and 26 October 2026, plus the batteries, cable and charger. The cost page has what every maker says about each part.
Outside the hull replacement parts in the water
Zinc anode
The metal that wears away in the water so the drive does not. VETUS calls it “Zinc anode (guide column)”.
From VETUS's 2022 spare parts guide, which gives the BOW PRO the same anode as the standard unit of its tunnel size.
Propeller
The propeller on the drive. VETUS calls it “6-blade propeller, 110mm diameter., blue, for 30kgf BOW PRO thruster”.
The maker lists this part by a name that covers this model, not by the model itself. Check it against your serial number before you order.
Inside the boat replacement parts on board
Motor controller
The electronics that run the motor when you press the panel. VETUS calls it “Motor controler for BOWA0304”.
The maker lists this part by a name that covers this model, not by the model itself. Check it against your serial number before you order.
Main fuse holder
The main fuse at the battery, in the rating the maker gives. VETUS calls it “fuse holder, VETUS part no.: ZEHC100”.
From VETUS manual 020802.05. The fuse size is in the manual's battery and cable table, which we could not read row by row, so we print no rating.
No part matches. Try the number without spaces, or the part’s name.
Spare part numbers come from VETUS’s parts pages and manuals. A dealer may sell a part we have not priced. Search for the number.
Other sizes and close alternatives
- Size down VETUS Bow 25 55 lb · $1,457
- Size up VETUS Bow Pro 361 79 lb · $3,188
- At 12 V VETUS Bow Pro 301 66 lb · $2,857
- Other maker Sleipner SE25/110S 66 lb · $1,485
- Other maker Lewmar 110TT Kit 62 lb · $936
- Other maker Max Power CT35 77 lb · $1,276
The other makers listed are the nearest match each makes, of the same style and for the same end, within a quarter of its thrust. The compare page lists every model, and the thruster index lists every model with a page here.
For the yard and the installer
Every published figure, with its source.
Full spec sheet
| Thrust and motor | |
|---|---|
| Thrust | 66 lb (30 kgf) As printed: Thrust (kgf) 30 (VETUS webshop, specifications tab) |
| Motor | 1.2 kW |
| Voltage | 48 V |
| Run limit | 10 min at a stretch, the user manual's S2 rating |
| Installation | |
| Type | Tunnel, fixed mount |
| End of the boat | Bow |
| Tunnel diameter | 110 mm |
| What it does to the hull | Tunnel bore below the waterline |
| Haul-out to install it | Yes |
| Maker’s boat length | Up to 24 ft |
| Price and ordering | |
| Price | No US price published |
| Part number | BOWA030448 V |
| Documents | |
| Manual | Installation manual (PDF)on the maker's site |
| The site’s review | VETUS thruster review |
Every published figure the site holds for the VETUS Bow Pro 304, with where each came from.
Draw, cable, fuse and battery at each voltage
These are the maker’s own figures, at each voltage it is sold at. The cable is the size for the shortest run in the maker’s table. A longer run may need heavier cable, and the wiring calculator works that out for your own boat.
| Voltage | Draw | Maker’s cable | Fuse | Battery | Run limit |
|---|---|---|---|---|---|
| 48 V | 45 Anominal draw | 2 AWG for up to 140 ft of cable counted out and back. Longer runs take heavier cableinstallation manual 020802.05, r07, December 2025 | 100 A, and 80 A (ZE80) in the controllerinstallation manual 020802.05, r07, December 2025 | 4 x 60 Ah - 12 V, in amp-hoursVETUS installation manual 020802.05, r07, December 2025 | 10 min at a stretch, the user manual's S2 ratingBOW PRO user manual |
The VETUS Bow Pro 304’s draw, cable, fuse, battery and run limit, as the maker publishes them.
- At 48 V: size the cable for your run, or check the battery you have.
Our notes from the manual and listings
In the box: Proportional: the joystick sets how hard it pushes. The thruster fuse sits in the connection unit.
Our note
The 48 V version of the smallest BOW PRO, built for boats with 48 V electric propulsion, in the same 110 mm tunnel as the 12 V unit. It is brushless and proportional, so the joystick sets how hard it pushes instead of switching it on and off. The installation manual rates it at 10 minutes (S2).
It gives 45 A at 48 V (50 at 42) and an example battery of four 60 Ah 12 V batteries. It calls for a 100 A main fuse and an 80 A fuse in the controller that must stay in place. No US dealer listed it on 18 September 2026. VETUS sells it by quotation from its own webshop.
Where each point above comes from
- The boat comes out of the water to install it: it needs a tunnel bore below the waterline.The mounting: a bore through the hull, or a housing recessed into it
- No US dollar price is published for it, so we can work out no installed cost.The maker and the dealers the database reads
Not sure this is the one? The thruster finder asks about your boat and prices every unit that fits.