Mercury Mariner Quicksilver Outboard Water Tube Seal Grommet 38452 | OEM 26-38452
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Mercury / Mariner / Quicksilver Outboard Water Tube Seal Grommet 38452
Part Number: 38452 | 26-38452
Brand: Mercury Marine / Quicksilver
Product Type: Water tube seal / grommet (OEM)
UPC: 745061140561
Approximate Package Size: 3.50" × 4.00" × 0.63"
This is a genuine OEM Mercury Marine / Quicksilver water tube seal grommet used in select Mercury and Mariner outboard gearcase and water pump housing service applications. It seals the water tube connection at the water pump housing to maintain proper cooling-water transfer through the lower unit.
Compatible Applications
Commonly associated with the following outboard configurations — verify by serial number and water pump housing diagram before ordering:
- 30 HP Jet
- 35 HP 2-cylinder
- 40 HP 2-cylinder
- 40 HP 4-cylinder
- 45 HP 4-cylinder
- 50 HP 3-cylinder
- 50 HP 4-cylinder
- 60 HP 3-cylinder
- 70 HP 3-cylinder
Serial Number & Diagram Fitment Notice
Fitment varies by outboard serial number and gearcase configuration. Always confirm against the exact Mercury or Mariner water pump housing parts diagram for your serial number range before ordering. Similar-looking seals and grommets may fit different housings in the same lower-unit family.
When to Replace This Seal
Replace part 38452 / 26-38452 when:
- Performing a scheduled water pump housing service
- The seal is hardened, cracked, compressed flat, or missing
- Signs of poor sealing or coolant bypass are present at the water tube connection
- Related water pump components (impeller, housing, gaskets) are being replaced
Installation Notes
- Confirm the correct water pump housing diagram for your engine serial number before installation
- Inspect the water tube, pump housing, impeller area, and related gaskets during the same service interval
- Seat the seal correctly so the water tube connection is fully sealed before reassembling the lower unit
Alternate Part Numbers & References
- 26-38452 — Full Mercury OEM part number
- 38452 — Short / catalog reference
- AM26-38452 — Aftermarket cross-reference
- GLM85360 — GLM aftermarket equivalent
- 26-38453 / 38453 — Related companion washer / sealing part in some service references (confirm diagram)
Related Parts & Service Items
- Mercury Upper Gearcase Seal Kit 26-32511A1
- Mercury Water Pump Gasket 858524
- Mercury Quicksilver Water Pump Repair Kit 853792A07 (25–30 HP 4-Stroke)
- Mercury Quicksilver Water Pump Repair Kit 8M0100527
Parts Desk Insights
The most common mistake with this seal is treating it as a generic rubber grommet and ordering by appearance. On Mercury and Mariner outboards, the correct match requires the water pump housing diagram and serial number — small cooling-system seals can look nearly identical but seal different sections of the lower unit. If you are servicing the water pump housing, inspect and replace all seals and gaskets in that housing at the same time rather than replacing only the damaged piece.
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.