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Advantage 340 Offshore Project Boat Review: Is This 1998 Rebuild Right for You?

The USD 9,250 Advantage 340 Offshore is a used 1998 project boat with a tri-axle trailer, cuddy comforts, and cockpit storage-but no engines, drives, or transom assemblies. See who this unfinished setup suits.

Last updated Aug 5, 2026

When shopping for a boat or personal watercraft, a project boat requires a clear choice: do you want an appealing layout and existing equipment to build around, or a package that is already equipped for use? The Advantage 340 Offshore 1998 Project Boat falls firmly into the first group. Its interior and onboard features give the project a defined starting point, while the missing propulsion and transom components create the central trade-off.

Quick verdict

At USD 9,250, the Advantage 340 Offshore combines a used 1998 boat with a tri-axle trailer and a cuddy layout that includes a large enclosed head. The main reason to consider it is the amount of usable structure and cockpit equipment already described. The main limitation is equally clear: it has no engines, drives, or transom assemblies. This is a fit for a hands-on buyer planning a substantial boat project, not someone seeking an already equipped propulsion package.

Advantage 340 Offshore 1998 Project Boat

The boat comes with a solid tri-axle trailer and five newer tires, including the spare. Inside, it has 6 feet of headroom in the cuddy, a very large enclosed head, storage in both the cockpit and cuddy, drop-down bolster seats, removable cockpit carpet, a cockpit cover, and a bimini top. Those details make the existing layout a concrete reason to take on the project.

The limitation is not cosmetic alone. The boat originally came with twin HP500s, but the current package is described as having no engines, drives, or transom assemblies. A buyer needs to be comfortable planning around that gap before treating the interior appointments or trailer as the deciding factor.

Who it suits

This Advantage is aimed at someone who wants to develop a project around a cuddy interior and offshore-oriented equipment. External hydraulic steering, offshore motor mounts, and K-planes are named among its additions, giving the boat more than an empty shell to work from. The tri-axle trailer is another practical fit for a buyer who wants the boat and trailer together rather than a boat-only project.

It is less appropriate for a shopper whose priority is immediate use with propulsion already in place. The missing engines, drives, and transom assemblies are the defining ownership consideration, so the right buyer is one who has a clear plan for those components and the work associated with them.

What stands out from the listed details

The strongest part of the package is its combination of space and cockpit equipment. The cuddy provides standing headroom and an enclosed head, while the cockpit includes storage, bolster seating, removable carpet, a cover, and a bimini top. The interior is described as being in good shape, which gives the project a more complete starting point than a bare hull-focused build.

The trailer is also described as solid, although it could use paint. That is a straightforward cosmetic consideration alongside the much larger mechanical scope.

Bottom line

The Advantage 340 Offshore 1998 Project Boat makes sense when the cuddy layout, enclosed head, storage, trailer, and existing offshore equipment matter enough to justify handling the missing propulsion and transom assemblies. Its appeal is the foundation already present; its limitation is the substantial work still required to complete the package.

Products in this article
Advantage 340 Offshore 1998 Project BoatUSD 9,250.00View on eBay
Advantage 340 Offshore 1998 Project BoatUSD 9,250.00View on eBay