repustor SeaDoo 3-Wire Dess Post Switch — Direct-Fit Plug-and-Play Replacement for XP/GS/GT/GTX

This is a direct-fit 3-wire Dess post switch for many Sea‑Doo models, designed as a plug-and-play replacement for worn or damaged starter/ignition switches.

When an aging switch causes intermittent starts, corrosion, or a non‑functioning ignition, replacing the Dess post switch restores reliable electrical control without complex rewiring. This replacement matches factory mounting and wiring for a wide range of Sea‑Doo personal watercraft from the late 1990s through the early 2000s, letting you get back on the water with a simple swap.

Which Sea‑Doo models does this switch fit?

This 3-wire Dess post switch is compatible with many Sea‑Doo models across several years. It covers XP series craft and numerous GS/GT/GTS/GTX variants produced from the mid‑1990s into the early 2000s, including later GTX WAKE units.

• Fits: XP / XP LTD (1996–1999); GS (1997–2001); GSI (1997); GTS (1997); GTI (1997–2000)
• Also fits: SP (1997); GSX / GSX RFI / GSX LTD (1997–2000); GTX (1997–2002)
• Includes compatibility with GTX LTD (1998–1999), GTX RFI (1998–2002), GTX DI (2000–2002), GTX WAKE (2003–2006)

What parts and numbers does this replace?

Use this switch when your original Dess post switch shows wear or fails electrical continuity. It replaces several OEM part numbers so you can cross‑check fitment before installing.

• Replaces part numbers: 278002325, 278002773, 278001734
• Also replaces: 278001589, 278000955, 278000646
• Compare your old switch photos and numbers to confirm correct replacement

How easy is installation and what is included?

The unit is built for straightforward installation: it’s a 3‑wire plug‑and‑play design that installs in the factory mounting location. No special tools or rewiring are normally required if your original wiring harness and connectors are intact.

• Package includes: 1 x 3‑wire Dess post switch
• Installation: plug the 3 wires into the matching harness connector and secure the switch in the OEM bracket
• Materials: constructed from durable components for stable electrical contact and long service life

How can I be sure this switch is right for my watercraft?

Before ordering, visually confirm the connector count and the OEM part number on your current switch. If the connector matches a 3‑wire Dess post and one of the cross‑referenced part numbers above, this replacement will be compatible.

• Check: compare the old switch’s connector, mounting style, and part number to the photos
• Ask: contact seller with photos if you’re unsure — the vendor can help verify fit
• Test: bench test continuity if you have a multimeter before and after installation

Who is this for: owners and technicians working on Sea‑Doo XP, GS, GSI, GTS, GTI, SP, GSX, GTX, and GTX WAKE personal watercraft from the specified model years who need a reliable, OEM‑style replacement for a failing Dess post/ignition switch. It’s also useful for restoration projects where original switches are corroded or inoperative and for service shops stocking common replacement parts.