Attwood 238 Series Pedestal Kits, LakeSport & Extension Posts

Attwood's 2⅜-inch seating hardware includes complete 238 Series kits, separate extension posts and LakeSport adjustable pedestals. These parts can look similar while differing in included components, installed height and whether they are classified for operator seating. Use the exact manufacturer number when selecting a replacement.

Complete kit, separate post or adjustable pedestal?

23809-7 and 23815-7 kitsEach includes a 360° swivel seat mount, removable satin-aluminum extension post and 9-inch round socket base. The post is 9 or 15 inches, respectively.
238 Series extension posts238613-1 and 238615-3 are standalone 13- and 15-inch extension posts for matching 238 Series assemblies; they are not complete kits.
LakeSport pedestals2385405 and 2385400 are bell-style adjustable pedestal assemblies with seat mounts, but their adjustment ranges and ABYC classifications differ.

Attwood 238 and LakeSport comparison chart

The chart distinguishes the manufacturer's ABYC component classifications: AO is an operator-position classification; AN is Type A for non-operator seating; and B is for non-helm seating. A component's classification does not independently certify a mixed or incomplete installation.

Manufacturer part Component Height Code Distinguishing detail
23809-7 Complete pedestal kit 9 in post AO 360° swivel seat mount, removable post and 9-inch round base
23815-7 Complete pedestal kit 15 in post AO 360° swivel seat mount, removable post and 9-inch round base
238613-1 Fixed extension post 13 in installed AO Post component for the matching standard 238 Series
238615-3 Fixed extension post 15 in installed AO Post component for matching standard 238 Series parts
2385405 LakeSport adjustable pedestal 12½–15½ in AO J-slot bell pedestal with included seat mount
2385400 LakeSport adjustable pedestal 14–20 in AN Manually adjustable bell pedestal with included seat mount
238613L1 LakeSport-only extension 13 in installed AN For matching LakeSport seat mounts only
238027-1 Pro-Pole extension 27 in installed B Tall Type B extension; not for a driver position
818440 LakeSport seat mount ⅝ in mount AN Aluminum friction-control mount; 3° tilt
818441 LakeSport seat mount ⅝ in mount AO Aluminum friction-control mount; 3° tilt
Critical distinctions: 2385405 is AO-rated with a 12½–15½-inch adjustment range, while 2385400 is AN-rated with a 14–20-inch range. The 238613L1 extension is for LakeSport mounts only and is AN-rated; it is not a substitute for the AO-rated 238613-1 standard 238 Series post.

Choose the correct mounting system

  1. Check the full MPN. 238613-1 and 238613L1 are different post specifications; the “L” designation matters.
  2. Confirm what comes in the package. The two 238-7 kits include a seat swivel, post and base. An extension post by itself does not supply the other mounting components.
  3. Measure the deck opening. The 23809-7 and 23815-7 kits require a 3-inch diameter mounting hole for their 9-inch round base. Check the fastening pattern and below-deck clearance independently.
  4. Match the seat mounting pattern. Attwood lists the kit seat mount hole centres at 5 × 5 inches; compare your seat manufacturer's installation instructions.
  5. Confirm the seating position. Use compatible components with the appropriate complete-assembly rating; an AN or B-rated post must not be selected for a helm seat merely because the base is AO-rated.
  6. Do not mix systems casually. Attwood lists LakeSport and standard 238 socket bases as interchangeable within its 238 systems, but the extension-post and seat-mount requirements must still be checked by MPN. Attwood does not recommend interchange with other manufacturers' hardware.

Matching 238 Series products

These links open the exact products in the NewRVParts catalog. Products ship from supplier warehouses and are not available for in-person viewing or pickup.

More Attwood seat hardware guides

For socket-base shape, deck opening and separate mount selection, see our 238 Series seat mounts and base comparison. For other pedestal systems, use the Snap-Lock pedestal guide and Lock'N-Pin pedestal-post guide.

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