0338484 Evinrude Johnson Gasket, Water Pump | Genuine OEM BRP Outboard Part
0338484 Evinrude Johnson Gasket, Water Pump | Genuine OEM BRP Outboard Part
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🔧 Product Description
Genuine BRP Evinrude Johnson Large-Gearcase Water Pump Gasket - Part Number: 0338484
A genuine BRP water-pump gasket for selected high-horsepower Evinrude and Johnson outboard gearcases.
The gasket seals the water-pump plate or impeller-housing assembly against the gearcase, preventing cooling-water pressure loss and reducing the risk of exhaust gas entering the pump inlet area.
⚙️ Key Features
- Genuine BRP OEM water-pump gasket
- Correct OEM part number 0338484
- Common unprefixed number 338484
- Used beneath the water-pump plate or housing
- Suitable for selected large V4, V6, V8 and E-TEC gearcases
- Sierra, SEI, GLM, Mallory and independent replacements available
🚤 Compatibility
Commonly used on selected
- Evinrude and Johnson 90HP-275HP two-stroke outboards from approximately 1980 onward
- Evinrude E-TEC 75HP-300HP gearcases from approximately 2005 onward
- V4 and V6 standard-rotation lower units
- Counter-rotation gearcases
- High-performance and commercial lower units where 0338484 is specified
Important fitment note
- Gearcase design—not horsepower alone—determines gasket fitment.
- Confirm the water-pump plate and housing arrangement.
- The gasket can appear similar to other OMC pump gaskets but differ in water-passage shape and bolt pattern.
🔌 Function
The gasket seals the stationary water-pump components to the gearcase.
Installation considerations
- Remove the old gasket completely
- Clean both mating surfaces
- Do not gouge the aluminium gearcase
- Confirm all water passages align
- Use sealant only when specified by the service manual
- Tighten the pump housing evenly
- Replace the impeller and seals where required
- Check tell-tale flow and water pressure after installation
⚠️ Common Signs of Failure
- Weak cooling-water pressure
- Engine overheats
- Pump draws exhaust gas
- Gasket is torn during disassembly
- Water leaks around the plate
- Corrosion damages the gasket surface
- Pump fails to prime after service
🔄 Supersession & Cross Reference
OEM / Related Numbers
- 0338484
- 338484
- 0324701
- 324701
- OEM Description: Water Pump Gasket
- Related impeller-housing seal: 0331353
- Associated wear plate, cup and pump housing vary by gearcase
Aftermarket / Verified Equivalents
- Sierra: 18-2557
- Sierra: 18-2557-9
- SEI Marine: 95-306-02
- GLM: 33730
- Mallory: 9-60401
- Generic water-pump gaskets replacing 0338484 / 0324701
Aftermarket packaging note
- Sierra 18-2557-9 is commonly supplied as a multi-gasket package.
- Confirm package quantity when setting inventory or selling individually.
📦 Condition
- Genuine BRP Evinrude Johnson OEM part
- Brand new
- Supplied in genuine or equivalent protective packaging
Shipping & Delivery
Shipping & Delivery
Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.
Returns & Warranty
Returns & Warranty
14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.
Not sure this fits?
Not sure this fits?
Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.
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