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  1. Home
  2. Engine
  3. Bow & Stern Thrusters

Bow Thrusters

We stock a selection of high-quality, Italian-made bow thrusters from Quick Nautical Equipment, with both single and double propeller options.  We also sell stern thruster tunnels and bow thruster tunnels, as well as accessories such as bow thruster control cable extensions, bow thruster propellers, hand-held remote controls, thruster controllers & propeller anode kits.  Replacement parts available include reversing contactor units, fuses, fuse holders, gaskets, elastic coupler joints & splitters.

Complete bow thruster kits are also on offer, including a single propeller bow thruster, tunnel, push-button controller, fuse holder & control cable extension.

What are Bow Thrusters?

A bow thruster is a propulsion device that provides lateral thrust to help with manoeuvrability. Bow thrusters push a boat’s bow or stern sideways in either direction through the water. Bow thrusters can come standard on a new vessel or be retrofitted on boats over 45 feet.  

How Do Bow Thrusters Work?

The addition of bow thrusters allows a boat to move to the side (port or starboard) without forward or backward thrust from the engine or rudder. Thrusters use suction to draw in water from one side of the boat and push it out the other side to move the boat in the opposite direction. Fitters install thrusters in through-and-through tunnels on either side of the boat or as external or retractable thrusters.  The measure of a bow thruster’s power is in kilogram-force (kgf) which is a gravitational metric unit of force. 

The three main bow thruster types are tunnel thrusters, external thrusters and retractable thrusters. You can add bow thrusters to an existing boat or buy a new boat with thrusters already installed.

1. Tunnel Thrusters

Tunnel thrusters are the most common type of thrusters. The tunnel is installed through the bow and below the waterline. Made of composite material, the tunnel can protect the propulsion unit and concentrate the propeller’s thrust. When measuring to find the best location for the tunnel, keep in mind that the top of the tunnel should be at least 75% of its diameter below the waterline, but ideally 1.5 times its diameter. The fitter inserts the propulsion unit into the tunnel from inside the boat.

One of the biggest difficulties with tunnel installation is to create a radius at the end of the tunnel to allow it to suck water into the tunnel without it cavitating. If air bubbles hit the propeller blades, the thrusters become noisy and lose up to 25% of their performance. High-performance boats may use deflectors to minimise speed loss from turbulence.  

2. External Bow Thrusters

Not all boats have enough hull space for tunnel or retractable thrusters, so external thrusters are required. They are easy to mount because external bow thrusters don’t require holes in the hull. The biggest downfall for external thrusters is the drag they can create which decreases the boat’s performance. The thruster is also at risk of snagging a buoy and being damaged.

3. Retractable Bow Thrusters

As the name suggests, retractable thrusters can be moved back into the hull when not in use, so there is no risk of snags or unnecessary drag. Electric actuators extend and retract the thrusters.  Retractable thrusters require more space for installation compared to the other two types.  

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Bow Thruster Control Cable Extension (TCD)

Bow Thruster Control Cable Extension (TCD) SKU: P-1290110

From $82.50

More Info
BTQ Bow Thruster Reversing Contactors

BTQ Bow Thruster Reversing Contactors SKU: P-1290161

From $828.43

More Info
Propeller Anode Kit - Quick BTQ Thrusters

Propeller Anode Kit - Quick BTQ Thrusters SKU: P-1290138

From $54.79

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Quick Bow Thruster BTQ110 25KGF 1.3kw Complete Kit

Quick Bow Thruster BTQ110 25KGF 1.3kw Complete Kit SKU: 1290189

$1,816.07 $1,933.24

On Sale

6%
OFF

Quick Bow Thruster BTQ125 30KFG 1.5kw Complete Kit

Quick Bow Thruster BTQ125 30KFG 1.5kw Complete Kit SKU: 1290190

$2,017.37 $2,147.53

On Sale

6%
OFF

Quick Bow Thruster BTQ125 40KFG 2.2kw Complete Kit

Quick Bow Thruster BTQ125 40KFG 2.2kw Complete Kit SKU: 1290191

$2,244.30 $2,389.09

On Sale

6%
OFF

Quick Bow Thruster BTQ140 - Single Propeller

Quick Bow Thruster BTQ140 - Single Propeller SKU: P-1290051

From  $2,070.44 $2,204.02

More Info
On Sale
Quick Bow Thruster BTQ185 - Single Propeller

Quick Bow Thruster BTQ185 - Single Propeller SKU: P-1290053

From  $2,577.36 $2,743.64

More Info
On Sale
Quick Bow Thruster BTQ185DP - Double Propeller

Quick Bow Thruster BTQ185DP - Double Propeller SKU: P-1290055

From  $3,150.16 $3,353.40

More Info
On Sale
Quick Bow Thruster BTQ250 - Double Propeller

Quick Bow Thruster BTQ250 - Double Propeller SKU: P-1290045

From  $6,343.57 $6,752.83

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On Sale
Quick Bow Thruster BTQ300 250KGF 10kw 24v

Quick Bow Thruster BTQ300 250KGF 10kw 24v SKU: 1290067

$8,603.66 $9,158.74

On Sale

6%
OFF

Quick Bow Thruster Replacement Fuses

Quick Bow Thruster Replacement Fuses SKU: P-1290170

From $22.52

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Quick Bow Thruster Tunnels

Quick Bow Thruster Tunnels SKU: P-1290070

From $306.80

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Quick BTQ Thruster Fuse Holder

Quick BTQ Thruster Fuse Holder SKU: 1290137

$85.11

Quick BTQ Thruster Replacement Gaskets

Quick BTQ Thruster Replacement Gaskets SKU: P-1290030

From $24.41

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Quick Elastic Coupler Joint suit BTQ Thrusters

Quick Elastic Coupler Joint suit BTQ Thrusters SKU: P-1290156

From $202.72

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Quick Hand-Held Radio Remote Control for Anchor Winches & Thrusters

Quick Hand-Held Radio Remote Control for Anchor Winches & Thrusters SKU: P-1010620

From $260.63

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Quick Hydraulic Bow Thruster BTQH250 Twin Prop 220KGF 10kw

Quick Hydraulic Bow Thruster BTQH250 Twin Prop 220KGF 10kw SKU: 1290046

$5,526.92 $5,883.49

On Sale

6%
OFF

Quick Pocket Transmitter Remote Controls for Anchor Winches & Thrusters

Quick Pocket Transmitter Remote Controls for Anchor Winches & Thrusters SKU: P-1010622

From $167.02

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Replacement Bow Thruster Propeller for Quick Bow Thruster BTQ 110

Replacement Bow Thruster Propeller for Quick Bow Thruster BTQ 110 SKU: 1290127

$67.57

Replacement Bow Thruster Propeller for Quick Bow Thruster BTQ 125

Replacement Bow Thruster Propeller for Quick Bow Thruster BTQ 125 SKU: 1290128

$67.57

Replacement Bow Thruster Propeller for Quick Thruster BTQ 140

Replacement Bow Thruster Propeller for Quick Thruster BTQ 140 SKU: 1290142

$67.57

Replacement Bow Thruster Propeller for Quick Thruster BTQ 185DP

Replacement Bow Thruster Propeller for Quick Thruster BTQ 185DP SKU: P-1290144

From $84.47

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Replacement Bow Thruster Propeller for Quick Thruster BTQ 250DP

Replacement Bow Thruster Propeller for Quick Thruster BTQ 250DP SKU: P-1290146

From $270.30

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Replacement Bow Thruster Propeller for Quick Thruster BTQ 300DP

Replacement Bow Thruster Propeller for Quick Thruster BTQ 300DP SKU: P-1290148

From $304.09

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Splitter suit TDC Controller

Splitter suit TDC Controller SKU: 1290115

$48.80

TCD 1022 Push Button Thruster Controller

TCD 1022 Push Button Thruster Controller SKU: 1290106

$304.69

TCD 1042 Single Joystick Thruster Controller

TCD 1042 Single Joystick Thruster Controller SKU: 1290105

$372.70

Out Of Stock
TCD 1044 Double Joystick Thruster Controller

TCD 1044 Double Joystick Thruster Controller SKU: 1290108

$659.60

Thruster Stern Tunnels

Thruster Stern Tunnels SKU: P-1290090

From $677.02

More Info
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Wema Tank Level Senders S5 240-30 Ohm SKU: P-1100050

From  $84.24 $97.20

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On Sale
Outboard Fuel Primer Bulbs

Outboard Fuel Primer Bulbs SKU: P-1080579

From $7.02

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Trim Ring Round 65mm - Black

Trim Ring Round 65mm - Black SKU: 1130852

$2.90

Suzuki Male 3/4-inch NPT Fuel Tank Fitting <75hp

Suzuki Male 3/4-inch NPT Fuel Tank Fitting <75hp SKU: 1080623

$6.14

Single Steering Cable Pulley Top

Single Steering Cable Pulley Top SKU: 1270328

$6.82

( BP8H-N-10 ) NGK Spark Plug

( BP8H-N-10 ) NGK Spark Plug SKU: 1080816

$5.65

Wema Tank Level Senders S3 240-30 Ohm

Wema Tank Level Senders S3 240-30 Ohm SKU: P-1100090

From $81.51

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We stock a selection of high-quality, Italian-made bow thrusters from Quick Nautical Equipment, with both single and double propeller options.  We also sell stern thruster tunnels and bow thruster tunnels, as well as accessories such as bow thruster control cable extensions, bow thruster propellers, hand-held remote controls, thruster controllers & propeller anode kits.  Replacement parts available include reversing contactor units, fuses, fuse holders, gaskets, elastic coupler joints & splitters.

Complete bow thruster kits are also on offer, including a single propeller bow thruster, tunnel, push-button controller, fuse holder & control cable extension.

What are Bow Thrusters?

A bow thruster is a propulsion device that provides lateral thrust to help with manoeuvrability. Bow thrusters push a boat’s bow or stern sideways in either direction through the water. Bow thrusters can come standard on a new vessel or be retrofitted on boats over 45 feet.  

How Do Bow Thrusters Work?

The addition of bow thrusters allows a boat to move to the side (port or starboard) without forward or backward thrust from the engine or rudder. Thrusters use suction to draw in water from one side of the boat and push it out the other side to move the boat in the opposite direction. Fitters install thrusters in through-and-through tunnels on either side of the boat or as external or retractable thrusters.  The measure of a bow thruster’s power is in kilogram-force (kgf) which is a gravitational metric unit of force. 

The three main bow thruster types are tunnel thrusters, external thrusters and retractable thrusters. You can add bow thrusters to an existing boat or buy a new boat with thrusters already installed.

1. Tunnel Thrusters

Tunnel thrusters are the most common type of thrusters. The tunnel is installed through the bow and below the waterline. Made of composite material, the tunnel can protect the propulsion unit and concentrate the propeller’s thrust. When measuring to find the best location for the tunnel, keep in mind that the top of the tunnel should be at least 75% of its diameter below the waterline, but ideally 1.5 times its diameter. The fitter inserts the propulsion unit into the tunnel from inside the boat.

One of the biggest difficulties with tunnel installation is to create a radius at the end of the tunnel to allow it to suck water into the tunnel without it cavitating. If air bubbles hit the propeller blades, the thrusters become noisy and lose up to 25% of their performance. High-performance boats may use deflectors to minimise speed loss from turbulence.  

2. External Bow Thrusters

Not all boats have enough hull space for tunnel or retractable thrusters, so external thrusters are required. They are easy to mount because external bow thrusters don’t require holes in the hull. The biggest downfall for external thrusters is the drag they can create which decreases the boat’s performance. The thruster is also at risk of snagging a buoy and being damaged.

3. Retractable Bow Thrusters

As the name suggests, retractable thrusters can be moved back into the hull when not in use, so there is no risk of snags or unnecessary drag. Electric actuators extend and retract the thrusters.  Retractable thrusters require more space for installation compared to the other two types.  

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