Sierra 18-3584-1 Ford Small-Block Marine Circulating Water Pump | 289/302/351 CID
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You have 30 days to request a return. All sale items are final sale.
Part Details
- Part Number: 18-3584-1
- Supersedes: Sierra 18-3584
- Replaced By: No further supersession — 18-3584-1 is the current active number
- Brand: Sierra (marine aftermarket replacement)
- Official Product Type: Marine Engine Circulating Water Pump
- System: Freshwater / Closed Cooling — Engine Coolant Circulation
- Includes: Sierra 18-0147 mounting gasket
- Construction: Bi-directional brass impeller, corrosion-resistant stainless-steel backing plate, powder-coated marine housing — new casting, not remanufactured
- GTIN / Barcode: 808282377939 / 808282258795
- Weight (approx.): 5,711 g / ~12.6 lb
Compatible Applications
This is the engine coolant circulating pump — not the raw-water impeller pump. It moves coolant through the engine block and cylinder heads. Verify fitment by original pump number and engine serial number before ordering.
- Ford 289 CID V8 marine applications
- Ford 302 CID / 5.0L V8 marine applications
- Ford 351W CID / 5.8L V8 marine applications
- MerCruiser Ford V8 — models 215, 255, 888 (where original pump cross-references match)
- OMC / BRP Ford small-block V8 applications
- Volvo Penta Ford-based V8 applications
- Pleasurecraft / PCM Ford V8 applications
- Indmar Ford V8 applications
Serial Number & Fitment Notice
Ford small-block marine engines were used by multiple manufacturers across many years, and front-cover, pulley, and hose configurations vary significantly. Do not select this pump based on engine displacement alone. Confirm the original pump number, engine serial number, and mounting arrangement against one of the OEM cross-references below before ordering. The bi-directional design supports conventional and reverse-rotation setups, but the physical configuration must still match your installation.
Superseded & Cross-Reference Part Numbers
- Sierra: 18-3584-1 (current) — supersedes 18-3584
- Mercury MerCruiser: 56879, 58086, 71683, 71683A1, 883885
- OMC / BRP: 982515, 982517, 3853796
- Volvo Penta: 3853796
- Pleasurecraft / PCM: RA057004
- Indmar: 592026
- GLM: 15400
- Mallory Marine: 9-42607
- MES: WP520M
- Sierra related: 18-3598
When This Part Needs Replacement
Replace the circulating water pump when you observe any of the following:
- Coolant leaking from the shaft seal, weep hole, or housing
- Bearing noise, roughness, or vibration
- Shaft or pulley wobble or excessive play
- Engine overheating despite correct coolant level and raw-water flow
- Weak or inconsistent coolant circulation
- Corrosion or damage to the housing or backing plate
- Belt alignment cannot be maintained due to bearing wear
Installation Notes
- Allow the engine to cool completely before starting work
- Disconnect the battery
- Drain the closed cooling system below the pump level
- Note the original belt routing and pulley position before disassembly
- Confirm the new pump matches original hose outlets and mounting pattern
- Clean the engine mounting surface thoroughly before fitting
- Install the supplied 18-0147 mounting gasket
- Tighten mounting bolts evenly to the engine manufacturer's specification
- Verify pulley alignment before setting belt tension
- Inspect the drive belt, thermostat, hoses, and clamps during service
- Refill with the correct marine coolant mixture and bleed trapped air per the engine service procedure
- Check for leaks and confirm stable operating temperature after start-up
Related Parts
- ARCO WP002 Volvo Penta / Indmar Ford 302 Replacement Water Pump — alternative for Indmar Ford 302 / Volvo Penta applications
- ARCO WP003 Volvo Penta / Indmar Ford 351 Replacement Water Pump — alternative for Ford 351W / Volvo Penta applications
- PCM Thermostat Kit 143°F – RP026002E — thermostat service kit for PCM / Pleasurecraft Ford engines
- PCM Pump-to-Thermostat Housing Elbow – R024002 — cooling system elbow for PCM / Pleasurecraft Ford engines
- Browse All Engine Parts & Maintenance
Parts Desk Insights
This is the engine coolant circulation pump, not the raw-water impeller pump — a common source of confusion on Ford-based closed-cooling systems. The most reliable way to confirm fitment is to match one of the OEM cross-references: 71683A1 for MerCruiser, 3853796 for OMC or Volvo Penta, or RA057004 for PCM applications. Customers ordering for older MerCruiser 215–888 applications should verify the front-cover and pulley arrangement, as these engines can vary in how the circulating pump mounts and connects.
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.