Hydraulic Steering Systems Raymarine

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Raymarine Drive Unit Selection
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 authorized 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.

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.

Autopilot Tip

If you cannot find the ram size on your steering system documentation, you can look on the cylinder ram itself for the brand and model number. Once you have the number use our hydraulic cylinder ram cross-reference guide to determine which hydraulic autopilot pump is compatible with your vessel’s hydraulic steering system.

ITEM

0.5ltr pump
0.5ltr pump

Hydraulic pump small
Hydraulic pump small

Hydraulic pump small
Hydraulic pump small

Hydraulic pump small
Hydraulic pump small

CR Pump
CR Pump
HYDRAULIC PUMPS
Drive TypeType 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 Number12V: E1213912V: M81120 24V: M8111912V: M81121 24V: M8112312V: M81122 24V: M8112412V: E12171 24V: E12172
Vessel DisplacementDoes not apply here. The drive unit is matched to the ram capacity of the steering system
Ram Capacity50cc-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 12V50bar (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 UsedACU-100ACU-150 (12v)
ACU-200
ACU-400ACU-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.

ITEM

Hydraulic linear small
Hydraulic linear small

Hydraulic linear small
Hydraulic linear small
HYDRAULIC LINEAR DRIVES
Drive TypeType 2Type 3
Part Number12V: E12207 24V: E1220812V: M81202 24V: M81203
Maximum boat displacement22,000 kg35,000 kg
Peak thrust585 kg1,200 kg
Maximum stroke254 mm300 mm
Hard-over to hard-over times10 seconds10 seconds
Maximum rudder torque1,270 Nm3,200 Nm
Corepack usedACU-400ACU-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 authorized 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.

ITEM

mechanical linear drive
mechanical linear drive

mechanical linear drive
mechanical linear drive

mechanical linear drive
mechanical linear drive
MECHANICAL LINEAR DRIVE
Drive TypeType 1Type 2 ShortType 2 Long
Part Number12V: M8113012V: M81131 | 24V: M8113312V: M81132 | 24V: M81134
Maximum boat displacement11,000 kg (24,000 lb)15,000 kg (33,000 lb)20,000 kg (44,000 lb)
Peak thrust295 kg (650 lb)480 kg (1,050 lb)480 kg (1,050 lb)
Maximum stroke300 mm (12″)300 mm (12″)400 mm (16″)
Hard-over to hard-over times11 seconds11 seconds14 seconds
Maximum rudder torque735 nm (6,500 lb.in)1,190 nm (10,500 lb.in)1,660 nm (14,700 lb.in)
Power consumption18-36 W48-72 W48-72 W
Corepack usedACU-200ACU-400ACU-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 authorized 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.

ITEM

rotary drive
rotary drive

rotary drive
rotary drive
MECHANICAL ROTARY DRIVES
Drive TypeType 1 12V: M81135Type 2 12V: M81136 24V: M81137
Maximum boat displacement11,000 kg20,000 kg
Peak output torque20 nm34 nm
Maximum shaft speed33 rpm33 rpm
Recommended hard-over times (no load)10 seconds10 seconds
Power consumption24-48 W60-84 W
Corepack usedACU-200ACU-400

Notes:

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

ITEMSTERN DRIVE
Part NumbersStandard Sterndrive: M81138Universal Sterndrive: E12026
Maximum boat displacementDoes not apply
Drive methodElectromechanical
Maximum thrust150 kg50kg
Recommended hard-over times8.8 seconds
Maximum stroke214 mm
Corepack usedACU-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.

Read more : Raymarine cSeries Multifunction Displays

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