Description
The Replacement Commander 512T-N8 Cylinder is designed to screw directly onto the outboard motor’s tilt-tube or pivot-tube, in exactly the same way as a conventional cable-steering unit. Like other tube-mount cylinders, it requires very little clearance to the side of the outboard motor. It is suitable for leisure boats with single outboards up to 135HP, or twin outboards up to 250HP TOTAL (counter-rotating).
What’s included
- 1x HyDrive 512T Cylinder
- 1x Hydrive 512T extension rod
- 2x HyDrive Bleeder tees with fittings to suit
- HyDrive N8 nylon hose
- MSH-5 flexi-hose O-Ring fittings
Compatibility & Usage
- Single-Engine HP capacity: up to 135HP; Twin-Engine capacity: up to 250HP TOTAL (counter-rotating)
- For a complete steering kit including this cylinder, see COMKIT-SPORT.
- HyDrive Ultra-15 steering fluid must be used – other brands of hydraulic oil will invalidate the HyDrive warranty.
- Note: This item is suitable as a replacement part for HyDrive hydraulic steering systems only. If you don’t have a HyDrive steering system please do not buy this item.
Brand & Reliability
HyDrive is designed and manufactured in Australia with a focus on tough, reliable steering systems and easy on-water serviceability. HyDrive systems are widely used on recreational boats, pilot vessels, commercial craft and Olympic sailing team support RIBs.


