Overview

The Attwood Marine 238613L1 is a fixed-height SWIVL-EZE LakeSport extension post for Attwood 238 Series seat mounts and socket bases. It uses a 2-3/8" post and sets seat height at 13", measured from the deck to the top of the seat mount.

This is the piece to match when you already have a 238 Series seating setup and want a straightforward height increase without moving to an adjustable pedestal. It is commonly used on fishing boats, pontoons, and cruising boats where a higher seat position helps with sightlines and day-to-day comfort. The 238 Series is not meant to be mixed with pedestal parts from other manufacturers, so matching the post to the correct mount and base matters for fit and latch engagement.

Key features

• Fixed 13" extension height, measured from deck to top of seat mount
• 2-3/8" diameter post for Attwood 238 Series LakeSport seat mounts and socket bases
• Hard-anodized aluminum tube for better resistance to corrosion in wet and salty conditions
• Low-friction locking latch for smoother insertion into the base
• Push-button release that makes removal from the base easier
• 238 Series hardware uses stainless steel springs
• ABYC Code B classification for passenger seating positions

Compatibility and fit

This post is built for the Attwood 238 Series system, sometimes referred to as LakeSport. It fits 238 Series seat mounts and socket bases and is a fixed-height extension post rather than a complete pedestal kit. If you are replacing an older post, the key checkpoints are the 2-3/8" diameter, the 13" installed height, and the matching 238 Series base and seat mount.

The ABYC Code B rating is useful to note when planning seat location on board. It suits passenger seating positions, so it is better matched to fishing seats and companion seating than to a helm position.

Materials and day-to-day use

The post tube is hard-anodized aluminum, and the 238 Series hardware uses stainless steel springs. That combination makes sense on boats where the pedestal sees spray, wet gear, repeated seat removal, and long stretches of storage between trips.

The latch shape and release button help when the seat needs to come out at the dock, during cleaning, or when converting deck space for fishing and boarding. For owners who want a seat height that stays the same every time, this fixed post keeps the setup simple.

Use on board

This 13" height is a practical middle-ground choice when the seat needs to sit higher than a low pedestal but you do not need an adjustable rise. It suits anglers, pontoon crews, and casual cruisers already running the 238 Series system who want a repeatable seating height and a clean fit with existing hardware.