WSM Performance 003721K Complete 4-Tec Jet Pump Assembly: Seadoo
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You have 30 days to request a return. All sale items are final sale.
Restore propulsion with the WSM Performance 003721K Complete 4-Tec Jet Pump Assembly designed for Sea-Doo.
Key Features
- Complete WSM jet pump assembly for Sea-Doo 4-Tec models listed by application (see Product Details and verify against your jet pump housing/impeller setup).
- 159mm jet pump assembly for the 003-721K model line.
- Includes the main jet pump assembly components needed to replace a worn unit rather than rebuilding individual parts (confirm your service plan and replace related seals/gaskets during install).
Product Compatibility
- Sea-Doo PWC (4-Tec), for use where a WSM 003-721K complete jet pump assembly is specified in the application listing.
Product Details
- WSM Performance complete jet pump assembly part number: 003721K (SKU: 848-003721K).
- Catalog reference: 003-721K Jet Pump Assembly, Complete (Sea-Doo 1503 4-Tec). ([wsmparts.com](https://www.wsmparts.com/Search/PartsSearch/BrowseSearch/?Catalog=1&Category=0&Level=4&Section=7&SubSection=1&utm_source=openai))
- Application/fitment details shown by WSM for 003-721K include Sea-Doo 1503 4-Tec coverage. ([wsmparts.com](https://www.wsmparts.com/Search/PartsSearch/BrowseSearch/?Catalog=1&Category=0&Level=4&Section=7&SubSection=1&utm_source=openai))
- Jet pump size listed for this assembly family: 159mm. ([wsmparts.com](https://www.wsmparts.com/Search/PartsSearch/BrowseSearch/?Catalog=1&Category=0&Level=4&Section=7&SubSection=1&utm_source=openai))
- Package weight (from Shopify variant): 3629 grams.
Parts Desk Insights
Best Use Case: Best for jet pump overhaul when you want a complete assembly replacement for a Sea-Doo 4-Tec 1503 application using the 003-721K (159mm) spec—especially when multiple wear items are suspected at the same time.
Common Issues: After installation, common problem areas include misalignment during re-mounting, overlooked related seals/hardware, and drive shaft/wear-ring mating surface issues. Confirm the jet pump mounting surfaces are clean, check the service manual steps for torque/seating order, and verify your existing prop/drive setup matches the jet pump spec.
Related Products & Accessories
- Browse Jet Pump & Housing Parts (Sea-Doo) - Find related components such as wear rings, seals, and other jet pump service items by searching the correct WSM 003-721K/jet pump category in the store catalog.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.