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We don't have a way for you to look up oem parts yet but you can use the parts search HERE to get part numbers then use the OSD search to see if we have what you need. If the part doesn't show contact us and we'll add any parts not listed to our site (if not discontinued).
If a part shows "0" in stock...
When searching our site, you may notice out of stock parts. Parts not in big demand aren't kept on hand but we can usually get any out of stock item in quick. On our OSD parts (will have OSD in the title) and aftermarket parts we can usually have those here in 2-3 days once ordered. On most OEM parts those take about a week to get in. If you want one disregard any "0" quantities and order for quick service!

OSD Sea Doo DESS Post Assy #1 (REPL 278000977)

  • Model: OSD4201
  • 5 Units in Stock
  • Manufactured by: OSD

Starting at: $59.99

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Electrical System Extras




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Now offered are switch assemblies we personally build form high quality components to the same specs as oem Sea Doo parts. Additionally, the terminals aren't just crimped but soldered then crimped for the best electrical conductivity and corrosion resistance you'll find. In the environments these are exposed to, you want the best so that's what we offer!

This is a complete Sea Doo DESS Post Switch to fit the models listed below. It includes a new plug that hasn't been installed yet so if your application requires the wires to be run through, all you have to do is put the wires through the grommet then install the plug and you're back in business. Just make sure to match the wire colors to the other connector when installing the plug!

  • Replaces Sea Doo p/n 278000977 (note – that's a DISCONTINUED part from Sea Doo)
  • GTS - 1997
  • GS - 1997 1998 1999 2000 2001
  • GSX LTD - 1997 1998 1999
  • GSX RFI - 1999 2000 2001
  • GTI - 1997 1998 1999 2000 2001
  • GTX - 1997 1998 1999 2000 2001 2002
  • GTX RFI - 1998 1999 2000 2001 2002
  • GTX DI - 2000 2001
  • LRV - 2000 2001
  • LRV DI - 2002 2003
  • RX - 2000 2001
  • RX DI - 2000 2001 2002
  • RX X - 2001
  • XP LTD - 1997 1998 1999 2000 2001

If you don't have the tool to disassemble Sea Doo connectors we sell those too.

Note that as is the case with your local dealer, there is no warranty on new or used electrical parts purchased from us. The reason is that we buy electrical parts with no warranty from our supplier so can't return one no matter what the situation. Since you're ultimately the one who wants to get back on the water, you assume all risk for purchasing a replacement part and agree you will not hold us responsible if it doesn't work or doesn't fix your particular problem. All electrical parts are thoroughly tested at the factory before being shipped to us so they should be in proper working condition when you receive one. We sell lots of electrical parts with few complaints but part failures do rarely occasionally happen so keep that in mind when considering a replacement part. Finally, you'll need to make sure all other electrical components are in proper working condition BEFORE installing a replacement part.


This product was added to our catalog on Wednesday 01 January, 2014.

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11/17/2017 - WE ARE CONTINUING TESTING MODS AND UPGRADES TO THIS SITE. IF YOU HAVE ANY ISSUES WITH ORDERING OR PAYMENT, PLEASE CONTACT US AND LET US KNOW. THANKS!




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If you've bought one of our carb kits, a great page by GroupK that details the procedures for carb fine tuning can be found HERE

TECH TIP...
If you're installing an impeller on a Sea Doo, don't follow the manual when it calls for red loctite on the threads... use anti-sieze instead. That way if you want to take it apart again you can. We've built hundreds of pumps now with anti-seize and it works great!

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