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Hydraulic Steering Systems Raymarine

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	Hydraulic pump small	Hydraulic pump small	Hydraulic pump small	CR Pump
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.

ITEM	Hydraulic linear small	Hydraulic linear small
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 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
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 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
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 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.

ITEM	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.

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