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Thrusters

Thrusters & Docking Control

Marine Thrusters, Controls & Service Parts

Shop bow thrusters, stern thrusters, tunnel thruster parts, control panels, props, relays, solenoids, anodes, and installation accessories for better close-quarters maneuvering.

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Fitment Check

Match voltage, thrust rating, tunnel size, prop style, controller type, and service-part dimensions before ordering thruster components.

Shop Thruster Parts

Thrusters are high-load marine systems. Confirm compatibility with the vessel, battery bank, wiring, fuse protection, tunnel, motor, and manufacturer service documentation before installation.

Quick ShopFitmentSystemsService PartsInstall NotesFAQBow ThrusterControl Panels

Fitment

Start With Voltage, Tunnel Size, and Thrust

A thruster part match usually starts with the system voltage, model number, tunnel diameter, propeller style, and control setup. For complete thruster systems, boat length, windage, hull shape, and docking conditions all affect sizing.

12V Thrusters 24V Thrusters Search by Model

Selection

Choose Parts by System, Not Guesswork

Thruster motors, gear legs, props, anodes, control panels, and solenoids can look similar across generations. Use the manufacturer model plate, manual, or existing part number whenever possible.

If you are replacing a failed part, inspect cables, fuses, battery capacity, joystick wiring, and water intrusion before installing the new component.

BOW

Bow Thrusters

Installed near the bow to push the front of the boat port or starboard during slow-speed maneuvering.

STR

Stern Thrusters

Add lateral control at the stern for better positioning when backing into slips or holding against wind and current.

CTL

Controls

Joystick panels, remotes, harnesses, relays, and safety devices keep the system responsive and protected.

Service Parts

Common Thruster Parts to Inspect

Thruster systems live in a harsh, high-current environment. Regular inspections can catch wear, corrosion, weak electrical connections, and mechanical damage before a docking problem appears.

Propellers and drive pinsLook for chips, slipping, missing hardware, or reduced thrust in one direction.
Anodes and gear-leg hardwareReplace depleted anodes and inspect underwater metals for corrosion or pitting.
Solenoids, relays, and fusesHigh-current switching parts can fail from heat, age, overload, or poor connections.
Controls and harnessesJoystick panels, plugs, and wiring should be dry, secure, and responsive.

Installation Notes

Electrical Capacity Matters

Thrusters draw heavy current for short bursts. Battery location, cable gauge, fuse size, isolation, charging, and voltage drop are critical to performance and reliability.

Battery Cable Fuses Battery Switches

Use

Short Bursts Work Best

Most recreational thrusters are designed for short docking corrections, not continuous running. Avoid long holds, repeated overloads, and using a thruster to fight conditions beyond the system rating.

For weak thrust, check battery voltage under load, prop condition, tunnel fouling, electrical connections, and thermal protection before assuming the motor is bad.

FAQ

Thruster Questions

What is the difference between a bow thruster and a stern thruster?

A bow thruster pushes the bow sideways for better slow-speed control. A stern thruster does the same at the stern, helping with backing, pivoting, and holding position near a dock.

How do I find the right replacement thruster part?

Use the thruster brand, model number, voltage, tunnel diameter, propeller style, and existing part number. Similar-looking motors, props, solenoids, and control panels are not always interchangeable.

Why does my thruster sound like it works but has weak thrust?

Common causes include low battery voltage, corroded cable connections, damaged propellers, slipping drive hardware, fouled tunnels, worn anodes, or a system that is overheating or current-limited.

Can a thruster run continuously?

Most small-boat thrusters are intended for short bursts while docking. Continuous use can overheat the motor, overload electrical components, or trip thermal protection.

Need Better Docking Control?

Shop Thrusters, Controls, Props, Anodes & Service Parts

Search by thruster type, voltage, model number, tunnel size, replacement part, control panel, or electrical component.

Shop Thrusters Thruster Parts Control Panels

Filters

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LewmarAnode Kit for 250TT

LewmarAnode Kit for 250TT

$102.32 - $102.32
$102.32
$102.32 - $102.32
$102.32
In stock

Replacement anode kit.

$102.32 - $102.32
$102.32
$102.32 - $102.32
$102.32
Lewmar Anode Kit for 185TT

Lewmar Anode Kit for 185TT

$40.78 - $40.78
$40.78
$40.78 - $40.78
$40.78
In stock

Replacement anode kit.

$40.78 - $40.78
$40.78
$40.78 - $40.78
$40.78
Lewmar Stern Adapter, 7-9/32" (185mm)

Lewmar Stern Adapter, 7-9/32" (185mm)

$2,222.77 - $2,222.77
$2,222.77
$2,222.77 - $2,222.77
$2,222.77
In stock

Stern Adapter only, fits 185TT Thrusters.

$2,222.77 - $2,222.77
$2,222.77
$2,222.77 - $2,222.77
$2,222.77
Lewmar Tunnel, 7-9/32" (185mm) x 4'11"

Lewmar Tunnel, 7-9/32" (185mm) x 4'11"

$1,022.71 - $1,022.71
$1,022.71
$1,022.71 - $1,022.71
$1,022.71
In stock

Tunnel only, fits 185TT Thrusters.

$1,022.71 - $1,022.71
$1,022.71
$1,022.71 - $1,022.71
$1,022.71
Lewmar Tunnel, 7-9/32" (185mm) x 3'3"

Lewmar Tunnel, 7-9/32" (185mm) x 3'3"

$683.47 - $683.47
$683.47
$683.47 - $683.47
$683.47
In stock

Tunnel only, fits 185TT Thrusters.

$683.47 - $683.47
$683.47
$683.47 - $683.47
$683.47
Lewmar Anode Kit for 140TT

Lewmar Anode Kit for 140TT

$35.98 - $35.98
$35.98
$35.98 - $35.98
$35.98
In stock

Replacement anode kit.

$35.98 - $35.98
$35.98
$35.98 - $35.98
$35.98
Lewmar Stern Adapter, 5-1/2" (140 mm)

Lewmar Stern Adapter, 5-1/2" (140 mm)

$1,840.34 - $1,840.34
$1,840.34
$1,840.34 - $1,840.34
$1,840.34
In stock

Stern Adapter only, fits 140TT Thrusters.

$1,840.34 - $1,840.34
$1,840.34
$1,840.34 - $1,840.34
$1,840.34
Lewmar Tunnel, 5-1/2" (140 mm) x 3'3"

Lewmar Tunnel, 5-1/2" (140 mm) x 3'3"

$524.28 - $524.28
$524.28
$524.28 - $524.28
$524.28
In stock

Tunnel only, fits 140TT Thrusters.

$524.28 - $524.28
$524.28
$524.28 - $524.28
$524.28
Lewmar Tunnel, 5-1/2" (140mm) x 2'6"

Lewmar Tunnel, 5-1/2" (140mm) x 2'6"

$408.08 - $408.08
$408.08
$408.08 - $408.08
$408.08
In stock

Tunnel only, fits 140TT Thrusters.

$408.08 - $408.08
$408.08
$408.08 - $408.08
$408.08
Lewmar Basic Control Panel

Lewmar Basic Control Panel

$474.63 - $474.63
$474.63
$474.63 - $474.63
$474.63
In stock

Ideal entry level control of thrusters Features On/Off illumination Easy installation connection Auto-Shut off not available

$474.63 - $474.63
$474.63
$474.63 - $474.63
$474.63
Lewmar 559017A Drive Pin, 2/pk

Lewmar 559017A Drive Pin, 2/pk

$24.82 - $24.82
$24.82
$24.82 - $24.82
$24.82
In stock

Rplacement drive pin for 185TT

$24.82 - $24.82
$24.82
$24.82 - $24.82
$24.82

Martyr Zinc Anode Lewmar 140TT Thruster 140mm CMT-589150Z

$14.45 - $14.45
$14.45
$14.45
$14.45 - $14.45
$14.45
Only 1 left!

The Martyr CMT-589150Z is a zinc bow thruster anode for Lewmar 140TT thruster applications. It is designed to help protect the thruster and nearby ...

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$14.45 - $14.45
$14.45
$14.45
$14.45 - $14.45
$14.45

Martyr Zinc Small Plate Anode Volvo Penta QL Bow Thruster CMT-41100276Z

$35.54 - $35.54
$35.54
$35.54
$35.54 - $35.54
$35.54
Only 1 left!

The Martyr CMT-41100276Z is a zinc small plate anode for select Volvo Penta QL bow thruster applications. It is a bolt-on sacrificial anode designe...

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$35.54 - $35.54
$35.54
$35.54
$35.54 - $35.54
$35.54

Side-Power Sleipner Bow Thruster Zinc Anode Kit 70-SM51180

$58.64 - $58.64
$58.64
$58.64
$58.64 - $58.64
$58.64
Only 2 left!

The 70-SM51180 is a zinc bow thruster anode kit for select Side-Power / Sleipner thruster applications. It is designed to help protect the thruster...

View full details
$58.64 - $58.64
$58.64
$58.64
$58.64 - $58.64
$58.64