How can I keep my outboard from turning while trailering?

Keep the outboard centred with a restraint suited to its steering system: purpose-made clips for compatible hydraulic steering, or a manufacturer-approved restraint for cable or tiller steering. Check the engine's trailering instructions first, because restraining sideways movement and supporting a tilted engine are separate jobs.

Find the source of movement

With the boat parked securely on its trailer, straighten the engine and gently push the gearcase sideways. Watch the steering cylinder, cable connection and engine swivel bracket to see where the movement occurs.

• The engine moves and the steering wheel turns: the steering is back-driving; a suitable transport restraint may be enough.
• The engine moves without corresponding wheel movement: check for loose linkages, worn joints or hydraulic steering faults before towing.
• The engine drops or bounces vertically: investigate the trim system and trailering support. Steering clips will not solve this.

A little play at a joint is different from a loose drag-link bolt or a leaking cylinder. Tighten loose fasteners to the steering manufacturer's specified torque. No single torque suits every installation.

Switch off the engine, remove the key and keep hands clear of the swivel and tilt brackets while anyone operates the steering or trim.

Choose compatible hydraulic steering clips

Removable steering clips are the simplest answer for many exposed-ram hydraulic installations. They fit over the exposed cylinder rod on each side of the moving assembly to limit sideways travel. They are often sold as outboard steering locks or hydraulic steering stabilisers.

Check compatibility with the cylinder itself, not just the outboard's horsepower. SeaStar, BayStar and other systems have different layouts. Integrated steering may have no suitable exposed rod. A clip advertised for one SeaStar cylinder will not necessarily fit another hydraulic installation.

1. Centre the outboard with the steering wheel.
2. Measure the exposed rod lengths on both sides and identify the cylinder model.
3. Fit the specified clips as instructed, without forcing the cylinder sideways.
4. Gently check that the engine cannot swing far enough to strike the transom, boarding ladder or another engine.

Allow roughly £15 to £40 for a simple clip set in the UK; more elaborate restraints cost more. Buy pieces sized for the installation. Rigid improvised spacers can damage the polished rod or foul the seals. Remove all transport clips before operating the steering.