Overview

The Attwood Marine 7557-7 is a stainless steel garboard drain plug for boats that use a 7/8 in drain opening. It uses a threaded removable plug with a retention feature that keeps the plug attached to the fitting, and the opening measures 7/8 in (27 mm). The body is polished 316 stainless steel, which makes sense for a drain point that sees regular splash, washdowns, and repeated removal through the season.

This plug is a straightforward replacement for a worn or missing garboard plug on a boat with the same drain size. The larger opening also works well where the drain point is used for stern drive service access. A gasket is not included, so the seal should be matched to the existing drain assembly.

Key features

• Fits a 7/8 in (27 mm) garboard drain opening
• Polished 316 stainless steel construction for better corrosion resistance around the transom and drain area
• Threaded removable plug with a retention feature so the plug stays with the fitting during draining and cleaning
• Large opening gives easier access on boats where the garboard drain is also used when servicing stern drives
• Gasket is not included, which matters when replacing an existing seal or matching the current setup

Compatibility and fit

The main point to confirm before ordering is drain size. This part is built around a 7/8 in opening, so it should be matched to the boat's existing garboard drain assembly rather than chosen by boat length or brand alone.

It is a good match for owners replacing a lost, corroded, or hard-to-remove plug on a boat that already uses this size. On older boats or custom installations, it is worth checking the existing fitting and sealing method before installation.

Installation and use

The threaded plug format keeps routine draining simple at haul-out, on the trailer, or during maintenance. The retention feature helps keep the plug from being misplaced when it is removed, which is useful around ramps, yards, and busy service areas.

For best results, keep the threads and sealing surface clean and inspect the gasket or sealing washer used with the existing assembly. On boats used in saltwater, a quick freshwater rinse during routine washdowns helps keep the finish and threads in better shape over time.