Raymarine Drive Unit Selection

Raymarine Evolution systems accommodate hydraulic, mechanical and power assisted stern drive systems. If you are not sure how to determine what type of steering system is installed on your vessel, please consult an authorised Raymarine dealer.

The Drive unit is the part that interfaces with your vessel's steering system to keep you on the right course. Raymarine has a broad range of drive units to match almost any type of steering system. 

Select your steering type below to explore available drive units...

Hydraulic Steering Systems

Raymarine Evolution pilots connect to hydraulic steering systems using a rugged hydraulic pump matched to the capacity of the hydraulic steering system.

If your system is hydraulic...

You'll need to find out the size (in cc) of the hydraulic cylinder ram(s) mounted to the rudder or inboard engined boats, or to the drive unit on outboard engined boats. Your steering system documentation will have this information.

  0.5ltr Hydraulic Pump | Raymarine   Type 1 Hydraulic Pump | Raymarine   Type 2 Hydraulic Pump | Raymarine   Type 3 Hydraulic Pump | Raymarine   Constant Running Pump | Raymarine  
  HYDRAULIC PUMPS
Drive Type Type 0.5 (12V) Type 1 (12V or 24V) Type 2 (12V or 24V) Type 3 (12V or 24V) Constant Running Pump (12V or 24V)
Part Number 12V: E12139 12V: M81120 24V: M81119 12V: M81121 24V: M81123 12V: M81122 24V: M81124 12V: E12171 24V: E12172
Vessel Displacement Does not apply here. The drive unit is matched to the ram capacity of the steering system
Ram Capacity 50cc-110cc
(3.1in3–6.7in3)
80cc – 230cc
(4.9in3–14in3)
230cc – 350cc
(14in3–21in3)
350cc – 500cc
(21in3–30.5in3)
500cc - 1200cc
(30.5in3 - 73in3)
Maximum Stall Pressure at 12V 50bar (750psi) 100bar (1450psi) 80bar (1160psi) 57 bar (827psi)
Peak Flow Rate (No Load) 1000cc/min (67in3/min) 2000cc/min (122in3/min) 2900cc/min (175in3/min) 4500cc/min (274.6in3 / min)
ACU Used ACU-100 ACU-150 (12v)
ACU-200
ACU-400 ACU-300

Notes:

  • In some systems with dual steering rams in parallel, cylinder capacity is the total of both rams. Rams in series only require single capacity valve. Hydraulic steering systems with steering rams over 500cc require our larger constant running pump used in conjunction with the relevant ACU - contact Raymarine for details.
  • An authorised Raymarine dealer is best suited to installing a hydraulic autopilot system.
  • Type 0.5 suitable for Volvo D4/D6 Sterndrive applications.
 

Hydraulic Linear Drives

Designed for larger mechanically steered vessels over 20,000kg, our hydraulic linear drives are self-contained hydraulic steering systems consisting of a reversing pump, reservoir and hydraulic ram.

A hydraulic linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering system manufacturer may be required. Must be able to back drive steering system for the rudder.

  Hydraulic Linear Drive | Raymarine   Hydraulic Linear Drive | Raymarine  
  HYDRAULIC LINEAR DRIVES
Drive Type Type 2 Type 3
Part Number 12V: E12207 24V: E12208 12V: M81202 24V: M81203
Maximum boat displacement 22,000 kg 35,000 kg
Peak thrust 585 kg 1,200 kg
Maximum stroke 254 mm 300 mm
Hard-over to hard-over times 10 seconds 10 seconds
Maximum rudder torque 1,270 Nm 3,200 Nm
Corepack used ACU-400 ACU-400

Notes:

  • A hydraulic linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering system manufacturer may be required.
  • An authorised Raymarine dealer is best suited for installing a linear drive system.
  • Must be able to back drive steering system for the rudder.
 

Mechanical Linear Drives

Our most commonly used drive types for sailing vessels. Raymarine mechanical linear drives provide powerful thrust, fast hard-over times and quiet operation. Mounted below decks, the linear drive moves the rudder directly by pushing the tiller arm or a rudder quadrant.

A linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering manufacturer may be required. Must be able to back-drive steering system from the rudder.

  Mechanical linear drive | Raymarine Mechanical linear drive | Raymarine Mechanical linear drive | Raymarine
  MECHANICAL LINEAR DRIVE
Drive Type Type 1 Type 2 Short Type 2 Long
Part Number 12V: M81130 12V: M81131 | 24V: M81133 12V: M81132 | 24V: M81134
Maximum boat displacement 11,000 kg (24,000 lb) 15,000 kg (33,000 lb) 20,000 kg (44,000 lb)
Peak thrust 295 kg (650 lb) 480 kg (1,050 lb) 480 kg (1,050 lb)
Maximum stroke 300 mm (12") 300 mm (12") 400 mm (16")
Hard-over to hard-over times 11 seconds 11 seconds 14 seconds
Maximum rudder torque 735 nm (6,500 lb.in) 1,190 nm (10,500 lb.in) 1,660 nm (14,700 lb.in)
Power consumption 18-36 W 48-72 W 48-72 W
Corepack used ACU-200 ACU-400 ACU-400

Notes:

  • A linear drive unit connects to the rudder stock via an independent tiller arm. Accessory fittings from your steering system manufacturer may be required.
  • An authorised Raymarine dealer is best suited for installing a linear drive system.
  • Must be able to back-drive steering system from the rudder.

Mechanical Rotary Drives

The rotary drive is designed for power and sailboat systems that can be driven from the helm position through a chain and sprocket (e.g. cable and rod steering system). The outstanding design of the Raymarine rotary drive unit provides smooth, powerful autopilot controlled steering with quiet operation.

Optional drive sprockets and modification to the steering chain may be required.

  Mechanical Rotary drive | Raymarine Mechanical Rotary drive | Raymarine
  MECHANICAL ROTARY DRIVES
Drive Type Type 1 12V: M81135 Type 2 12V: M81136 24V: M81137
Maximum boat displacement 11,000 kg 20,000 kg
Peak output torque 20 nm 34 nm
Maximum shaft speed 33 rpm 33 rpm
Recommended hard-over times (no load) 10 seconds 10 seconds
Power consumption 24-48 W 60-84 W
Corepack used ACU-200 ACU-400

Notes:

  • Optional drive sprockets and modification to the steering chain may be required.
  • An authorised Raymarine dealer is best suited for installing a linear drive system.

Stern Drives

The stern drive is for use with inboard/outboard (I/O) vessels with power assisted steering.

  STERN DRIVE
Part Numbers Standard Sterndrive: M81138 Universal Sterndrive: E12026
Maximum boat displacement Does not apply
Drive method Electromechanical
Maximum thrust 150 kg 50kg
Recommended hard-over times 8.8 seconds
Maximum stroke 214 mm
Corepack used ACU-200

Notes:

  • Always verify compatibility before installing a drive unit by consulting an authorised Raymarine dealer or Raymarine's Customer Support team.
  • Drive compatible with 1997 or later Mercruiser power assist inboard/outboard drives and Volvo Penta.
  • Vessels with 12V systems only.
  • An authorised Raymarine dealer is best suited for installing a linear drive system.
  • Compatible with Volvo Penta and Mercruiser I/O drive engines - see dealer for bracket options with standard I/O drive.