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.
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| 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.
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| 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.
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| 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.
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| 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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