Finding a sturdy, compatible seat base is essential for upgrading a jon boat or similar boat setups. This guide highlights five top options to fit 3/4″ pin post sockets and 7″x7″ bases, commonly used on jon boats, bass boats, and fishing boats. The selections cover clamp-on and pedestal mounts, swivel bases, and zinc-coated steel options. They’re best for boaters who want easy installation, corrosion resistance, and stable seating for long days on the water.
| Product | Best For | Key Benefit |
|---|---|---|
| CLLOMAGY Boat Seat Base Mount | Pontoon, fishing, jon, bass boats | Direct base replacement with a universal 3/4″ pin post socket |
| Attwood 90720 Black Powder Coated 7″ Seat Pedestal | Semi-permanent pedestal setup | Integrated mounting plates for solid, corrosion-resistant mounting |
| Attwood 15700-3 Seat Mount, Clamp-On With Swivel | Flexible installations on existing benches | Adjustable height and universal hole compatibility |
| CLLOMAGY Boat Seat Swivel Base Mount | Swivel seating on jon/bass boats | 360° swivel, clamp-on, corrosion-resistant |
| MANUMARINE Clamp On Boat Seat Swivel Base | Versatile, quick setup | Zero-tools option plus secure screw-in option |
CLLOMAGY Boat Seat Base Mount for 3/4″ Pin Post Socket
The CLLOMAGY base replaces an existing seat and adds a new mounting point on decks, docks, or boarding areas. It fits standard 3/4″ pin posts and measures about 7″ x 7″ to align with common seat bases. This option is best for anglers and boaters who want a straightforward pedestal replacement that tightens seating stability on pontoon, jon, bass, and fishing boats. A key advantage is ease of installation: drill a 2.5–3″ hole and six screw holes, then secure the base and slide the post in for a solid, steady seat.
Who this is best for: boaters seeking a reliable base upgrade that fits most universal 3/4″ posts without additional adapters. Why selected: its universal fit and simple install process support quick upgrades on deck seating for improved stability.
Limitations: requires a flush deck space and precise hole placement; ensure the base aligns with your existing mounting pattern to avoid misfit.
Attwood 90720 Black Powder Coated 7″ Seat Pedestal
This pedestal features reinforced welded joints and an integrated base mounting plate with a seat mounting plate, delivering a sturdy, corrosion-resistant foundation for boat seats. Best for boats where a solid, long-lasting pedestal is needed, particularly in salt or brackish water environments where rust resistance matters. It’s a better option for users who value built-in mounting hardware that reduces the number of separate parts to manage.
Who this is best for: boat owners who want a durable, all-in-one pedestal with strong mounting points. Why selected: built-in plates simplify mounting and improve overall rigidity.
Limitation: it’s a fixed 7″ pedestal height without adjustable range, so ensure it matches your seating height preference before installation.
Attwood 15700-3 Seat Mount, Clamp-On With Swivel
This swivel clamp-on mount fits a broad range of common seat hole patterns, supporting flexible installation. It’s constructed from steel with a durable black powder-coated finish, offering strong corrosion resistance for marine use. The height can extend from 7.5″ to 18″ to accommodate varying seating positions and leg comfort. This makes it a versatile choice for boats whose seating layouts change or require occasional adjustments.
Who this is best for: boaters needing adaptable seating with a swivel that can be installed onto existing benches. Why selected: universal hole compatibility plus adjustable height deliver broad compatibility and comfort.
Limitation: clamp-on systems may require careful alignment to ensure the seat does not slip or rotate under heavy use.
CLLOMAGY Boat Seat Swivel Base Mount
This clamp-on swivel base replaces the standard boat seat swivel and supports 360° rotation, making it ideal for jon boats, bass boats, and kayaks with benches. It features a marine-grade galvanized steel construction with a black powder-coat finish for corrosion resistance, ensuring long-term durability in saltwater or freshwater settings. Best for: boaters who want easy on-deck swivel access without replacing the entire seat assembly.
Who this is best for: users seeking full swiveling capability on a clamp-on base that fits common bench configurations. Why selected: 360° rotation improves line-of-sight and social seating during fishing trips.
Limitation: clamp-on design may require periodic re-tightening to maintain stability during rough water.)
MANUMARINE Clamp On Boat Seat Swivel Base
Offering two setup options, this swivel base can snap on instantly or be secured with screws for maximum stability. It features a smooth 360° swivel for easy reach and awareness while navigating, fishing, or socializing. The base is made from heavy-duty galvanized steel with a black protective coating, designed to withstand saltwater exposure and prevent rust. Best for: boaters who want a quick-install option with an optional more permanent attachment for durability.
Who this is best for: those who want a flexible installation approach and reliable long-term performance. Why selected: dual setup modes provide convenience and stability depending on user preference.
Limitation: zero-tools setup is convenient, but screw-secured installation may be preferred for high-use scenarios to ensure maximum rigidity over time.
Buying Guide
What size and pattern are you matching? Ensure the base plate is 7″ x 7″ and the post uses a 3/4″ pin post socket to fit your boat seats without adapters.
Is your boat exposed to saltwater or freshwater? Look for galvanized steel or zinc-coated parts with corrosion resistance to extend life in marine environments.
Do you need adjustable height or 360° swivel? If yes, prioritize pedestal heights (7.5″ to 18″) and swivel bases with full rotation to improve seating comfort and reach.
How permanent should installation be? Clamp-on options offer quick upgrades and reversibility, while pedestal bases with screw-in attachments provide stronger long-term stability.
What is your seating layout? For boats with benches, clamp-on swivel bases or integrated mounting plates simplify installation without major deck modifications.
Frequently Asked Questions
- What is a 3/4″ pin post socket? A standard mounting hole size used by many boat seats; bases with this socket accept most common seat posts.
- Are swivel bases waterproof? Yes, most marine swivel bases are designed with corrosion-resistant finishes and sealed hardware to endure water exposure.
- Can I install these myself? Many options are designed for DIY installation with basic tools; check the included mounting requirements.
- Which is better for stability, clamp-on or pedestal? Pedestal bases generally offer more rigidity, while clamp-ons provide easier temporary upgrades.
- Do any bases require professional installation? Most are DIY-friendly, but consider professional help if your boat deck requires structural modifications.
- Will these bases fit existing seats? These selections target 7″ x 7″ bases and 3/4″ pin posts, which cover many standard seat configurations.