Overview

The Raymarine D159 is a 4-inch tiller bracket for Raymarine tiller pilots, used when the boat's tiller sits higher or lower than the fixed end of the tiller drive and the pilot needs to mount horizontally. It gives the tiller pilot a better mounting position without changing the basic tiller pilot layout.

This is a mechanical autopilot mounting accessory, not an electrical or network component. There is no 12V or 24V wiring, no SeaTalk, and no NMEA connection to account for; the main fit check is whether your installation needs a 4-inch bracket to bring the tiller pilot into the correct horizontal alignment.

Key features

• 4-inch tiller bracket for Raymarine tiller pilot installations where height correction is needed.
• Helps keep the tiller pilot mounted horizontally when the tiller height does not line up with the fixed end of the drive.
• Useful for sailboats where cockpit geometry, tiller shape, or existing mounting points place the tiller above or below the drive line.
• Mechanical mounting hardware with no power draw, fuse sizing, or marine network setup required.
• Fits into the autopilot mounting layout as a practical height-adjustment accessory rather than a replacement drive component.

Installation and fit

Before ordering, measure the height difference between the tiller pilot drive line and the intended attachment point on the tiller. This bracket is the 4-inch version, so it suits installations where that amount of vertical correction is needed to bring the pilot closer to a straight, horizontal working angle.

Mounting should be checked with the tiller centered and the pilot in its normal operating position. A clean alignment helps the drive push and pull the tiller without side loading, which matters on longer passages, short-handed sailing, and routine coastal cruising where the tiller pilot may be working for extended periods.

Use on board

This bracket is a good match for tiller-steered sailboats using a Raymarine tiller pilot where the standard mounting height does not line up cleanly. It is especially relevant after cockpit refits, tiller changes, or autopilot replacements where the drive end and tiller attachment point no longer sit on the same plane.