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Thruster specs
Yacht Thruster Simplex 300S: specs, price and the boats it fits
The Simplex 300S is Yacht Thruster’s workhorse: a slim aluminum pod that bolts to the outside of the hull at the bow or the stern, so there is no tunnel to cut and nothing takes room inside. Yacht Thruster rates it at 207 lb at the bow, for boats up to 55 ft; that is a “thrust equivalent”, its push times 1.4. Our size tables use the push, 148 lb, the maker’s own stern figure. It is made for displacement boats, trawlers and sailboats among them.
Yacht Thruster prints no price and quotes through its contact form. Every kit comes with a joystick or touchpad and the control box. The unit runs on 24 V, so a 12 V boat needs a 24 V bank of its own; batteries, cable and a charger come to about $700 to $731 on our estimate. See every part.
Fitting it takes one 2 in hole for the sealed cable fitting and two small holes for the mounting rods, with no fiberglass work, though the boat has to come out of the water. The maker puts the unit itself at one to two hours, cables extra. Keep the pod in antifouling over an aluminum primer. It runs up to five minutes at a stretch. The FAQ says two years of warranty and the product pages three, so get yours in writing.
Installers will find the wiring figures and dimensions further down. For the rest of Yacht Thruster’s line, read the Yacht Thruster and ezDrive review.
Where this summary comes from (5 sources, read 13 October 2026)
- Yacht Thruster Simplex 300S page (bow or stern, three small holes, 25 minutes an hour)
- Yacht Thruster specifications (thrust, volts, current, boat size by end)
- Yacht Thruster FAQ (one to two hours for the unit, 24 V bank, antifouling, five minutes, warranty)
- Yacht Thruster overview (a 50 mm hole and two 18 mm rod holes)
- Yacht Thruster controls (joystick or touchpad and control box in every kit)
Key facts
- DIY level 3 of 5 Split with the yard
- Thrust 207 lb 94 kgf, Yacht Thruster's rating
- Boat length Up to 55 ft Yacht Thruster's own range
- Price No US price None is published, so there is no fitted cost to work out
- Fitted by a yard No total No price to build on
- Voltage 24 V As sold
- Mounts External Fixed mount, bow or stern
- To fit it Haul-out The boat comes out of the water
- Run limit Up to 5 min Continuous, with an automated shutdown
Every figure here is the maker’s or a dealer’s. No US price is published, so there is no fitted cost to estimate. The full spec sheet is further down.
How much of the install is yours
DIY levels
- Level 5: Owner install. No yard, no electrician.
- Level 4: You fit 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 fits 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 h Yard: 1 to 2 h Electrician: 2 to 4 h Plus a haul-out.
- Bolt the pod to the hull below the waterline Yard 1 to 2 h The maker’s figure, as Yachts International reported it: one to two hours for the thruster itself, without the cable connections. Source.
- Mount the battery box, switch and fuse holder; run and secure the cables You 4 to 16 h 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 h Our estimate. Nobody publishes a time for the final connections and test on their own.
Your part needs:Heavy battery cableCrimping big lugs
A qualified marine electrician should make the final connections and test them before first use. Hours are labor only.
Is it right for your boat?
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 43 ft. The maker gives one range for every boat.
The table is sized on the bow figure, 207 lb. At the stern Yacht Thruster prints 148 lb.
The table below tries the Yacht Thruster Simplex 300S Thruster 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 where it mounts 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 60 ft, just past Yacht Thruster’s own range (up to 55 ft).
| Boat | Full thrust at 15 knots | Still a fit, in lighter wind |
|---|---|---|
| Pontoon & tritoon | Not listed. Its maker does not name this kind of hull. | |
| Sailboat | 36 to 43 ft | 44 to 60 ftfull thrust to about 11 knots at 60 ft |
| Houseboat | Not listed. Its maker does not name this kind of hull. | |
| Catamaran | Not listed. An external unit bolts to the side of a single hull at the bow or to its transom, and a cat has two narrow hulls with a bridgedeck between them, so there is nowhere forward to hang one. | |
| Trawler | 36 to 43 ft | 44 to 60 ftfull thrust to about 11 knots at 60 ft |
| Motor yacht | 36 to 43 ft | 44 to 60 ftfull thrust to about 11 knots at 60 ft |
| Bass & flats | Not listed. This site lists no external bow unit for a boat that planes. | |
| Wake & ski boats | Not listed. This site lists no external bow unit for a boat that planes. | |
| Express cruiser | Not listed. This site lists no external bow unit for a boat that planes. | |
| Center console | Not listed. This site lists no external bow unit for a boat that planes. | |
Reading the two length columns. 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 falls short of what the boat needs by no more than 10 percent, and gives the whole figure only in the lighter wind named. On a boat shorter than the first column’s shortest length, the unit is more than the boat needs.
It is sized for three kinds of boat here. For your own boat, the finder gives an answer that also counts your drive and who does the fitting. The compare page sets this unit beside others.
What it costs fitted
No US dollar price is published for the Yacht Thruster Simplex 300S Thruster, 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.
What else you buy
What follows comes from Yacht Thruster’s Overview and FAQ pages, read 30 September 2026.
- In the box
- The thruster with its through-hull fitting and seals, the rods and seals of the mounting kit, the control box and controls.
- Bought separately
- Fuse, switch, cable and battery are not named on either page.
- Charging
- A 12 V unit may share the boat's supply, even a windlass feed if a specialist agrees. A 24 V unit on a 12 V boat needs a bank of its own. Neither page names a charger.
In Yacht Thruster’s words, from the FAQ: “In order to run a 24V Yacht Thruster with an on-board voltage of 12V, an additional 24V battery bank will be required.”
A yard job adds these parts on top of the unit: $88 to $268 for the priced ones below, at Fisheries Supply’s prices on 30 September 2026, plus the batteries, cable and charger.
| Part | What it is | What to ask for | Dealer price |
|---|---|---|---|
| Main fuse | A slow-blow fuse of the ANL type at the battery, in the size the maker prints for the model. | Yacht Thruster names none | $18–$57Side-Power ANL fuses, Blue Sea ANL fuses, at Fisheries Supply, read 16 October 2026. |
| Fuse holder | The block the ANL fuse bolts into, with a cover. | Yacht Thruster names none | $27–$93Egis and Blue Sea ANL fuse blocks, Side-Power ANL fuse holders, at Fisheries Supply, read 16 October 2026. |
| Main battery switch | The switch that cuts the thruster off from its battery when you leave the boat. | Yacht Thruster names none | $35–$107Egis m-Series 300 A, Blue Sea e-Series 350 A and HD-Series 600 A on/off switches, at Fisheries Supply, read 16 October 2026. |
| Control-circuit fuse and switch | A small fuse, and often a switch, on the thin wire that powers the panel or control box. | Yacht Thruster names none | $8–$12Blue Sea in-line ATO fuse holders, at Fisheries Supply, read 16 October 2026. |
| Battery cable and lugs | The two heavy cables from the battery to the motor, sized to the length of the run. The wiring calculator sizes them. | Yacht Thruster names none | In the electrical line |
| Battery bank | A cranking-type bank near the motor, sized by the maker's cold cranking amps. The battery calculator checks it. | Yacht Thruster names none | In the electrical line |
| Charger or charge feed | How the thruster bank gets charged: a shore charger of its own, a DC-to-DC charger or charging relay from the boat's system, or a charger built into the unit. | Yacht Thruster names none | $146–$305NOCO GEN5X2 shore charger, Victron Orion-Tr Smart DC-DC charger, Blue Sea ML-ACR charging relay, at Fisheries Supply. |
The cost page has the whole list with what every maker says about each part.
For the yard and the installer
The full spec sheet, grouped the way a yard reads it. Every figure is the maker’s or a dealer’s, with its source.
| Thrust and motor | |
|---|---|
| Thrust | 207 lb (94 kgf) As printed: 207 lbf bow / 148 lbf stern |
| Motor | 3 kW |
| Voltage | 24 V |
| Fitting | |
| Type | External, fixed mount |
| End of the boat | Bow or stern |
| What it does to the hull | Three small holes, below the waterline |
| Haul-out to fit it | Yes |
| Maker’s boat length | Up to 55 ft |
| Price and ordering | |
| Price | No US price published |
| Part number | Not held for this listing |
| Documents | |
| Manual | None found |
| Warranty | Yacht Thruster's FAQ gives 2 years, and its product pages give 3. Yacht Thruster's FAQ |
| The site’s review | Yacht Thruster and ezDrive review |
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 |
|---|---|---|---|---|---|
| 24 V | 175 Anominal draw | Not published | Not published | Not published | up to 5 min continuous, with an automated shutdownFAQ |
- At 24 V: size the cable for your run, or check the battery you have.
What holds up and what to weigh
Each point names the fact it rests on.
What holds up
- Yacht Thruster sells it for either end, so it can go at the bow or the stern.The maker's listing
What to weigh
- The boat comes out of the water to fit it: it needs three small holes, below the waterline.The mounting style
- It bolts under the hull about 10% of her length back from the bow, not at the very end, so the boat tables on this page count its 148 lb of push as worth about 125 lb from a unit right at the bow. Yacht Thruster's 207 lb is a "thrust equivalent" that already adds credit for the position, so we judge it on the push and work the position out ourselves.Yacht Thruster publishes no position drawing; this is the same Marinno pod, so Sleipner's EX drawings (2893 rev 7, 2019, figures 6 and 7) are used. The push: Yacht Thruster's own stern rating for the same unit, 148 lbf; its 207 lbf bow figure is 1.4 times that, the thrust equivalent its specification table prints
- No US dollar price is published for it, so we can work out no fitted cost.The maker and the dealers the database reads
What the manual and listings say
This is the note we keep on the Yacht Thruster Simplex 300S Thruster, written from the maker’s manual, its product pages and the dealer’s listing.
In the box: The through-hull fitting, its seals and the control box come with it.
Our note
One unit rated two ways: 207 lbf at the bow and 148 lbf at the stern. It weighs 43 lb, is 26.5 in long and draws 175 A at 24 V. It bolts through the hull below the waterline, so the boat comes out of the water to fit it. It takes one 2 in hole for the fitting and two 18 mm holes for the rods.
Yacht Thruster puts the thruster itself at one to two hours once she is out. The FAQ gives a run time of up to five minutes continuous and 25 minutes an hour. The product pages promise a three-year warranty, where the FAQ says two. No price is published. The maker quotes by phone or its contact form.
Videos
Two of Yacht Thruster’s own videos, from its YouTube channel: the full install of the 300 Simplex, and the install in one minute. They are the maker’s pitch. Watch them for what the unit looks like and how it goes in, and take any claim back to the figures above.
Other sizes and close alternatives
These are Yacht Thruster’s nearest sizes by thrust, in any of its lines.
- One size up: Yacht Thruster Duplex 600D Thruster, 397 lb.
These are other makers’ units of the same style, for the same end, within a quarter of its published thrust. Each is that maker’s nearest match.
- Max Power CT100 stern pod, 212 lb, $5,088.
- Sleipner SX80, 212 lb, $8,750.
Every model with a page here is listed, maker by maker, on the thruster index.