Circulation Water Pump – Fits Ford 302/351W Small Block Marine Engines (Replaces OMC 3853796, Mercruiser 71683)
Circulation Water Pump – Fits Ford 302/351W Small Block Marine Engines (Replaces OMC 3853796, Mercruiser 71683) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Circulation Water Pump – Fits Ford 302/351W Small Block Marine Engi...
Product Details
This is a direct-replacement Circulation Water Pump – Fits Ford 302/351W Small Block Marine Engines. It is designed for Ford-based 5.0L/5.8L (302/351W) V8 marine engines, rated between 188-225 HP, manufactured from 1993–1996. Its bidirectional design and brass impeller ensure reliable coolant flow in marine environments.
This unit serves as a direct interchange for a wide range of part numbers from brands including OMC, Mercruiser, Volvo Penta, Sierra, GLM, API Marine, Indmar, Mallory, MES, and Pleasurecraft.
- Installation Type: Direct Bolt-on
- Environment: Specially made for marine use
- Key Components: Includes pump, gasket, stainless steel hub, and hub gasket
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| OMC | 3853796 |
| OMC | 835783 |
| OMC | 509357 |
| OMC | 982515 |
| OMC | 982517 |
| Mercruiser | 71683 |
| Mercruiser | 71683A1 |
| Mercruiser | 883885 |
| Volvo Penta | 835783 |
| Volvo Penta | 385796 |
| Sierra | 18-3584 |
| GLM | 15400 |
| API Marine | WP4000 |
| Indmar | S592026 |
| Mallory | 9-42607 |
| MES | WP520M |
| Pleasurecraft | RA057004 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This pump is designed for specific Ford-based marine engines used by OMC, Mercruiser, and Volvo Penta.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Ford | 5.0L (302) | 188-225 | 4-Stroke | 1993–1996 | OMC 3853796 | V8 Marine Applications |
| Ford | 5.8L (351W) | 188-225 | 4-Stroke | 1993–1996 | OMC 3853796 | V8 Marine Applications |
| OMC | Ford-based V8 | 188-225 | 4-Stroke | 1993–1996 | 3853796/509357/982515/982517 | |
| Mercruiser | Ford-based V8 | 4-Stroke | 71683/71683A1/883885 | |||
| Volvo Penta | Ford-based V8 | 4-Stroke | 835783/385796 |
Technical Specs
- Product Type
- Circulation Water Pump
- Installation
- Direct Bolt-on
- Connection
- Direct Mount
- Housing Material
- Metal with Brass Impeller
- Housing Color
- Natural Metal
- Dimensions
- 35.0 cm x 23.5 cm x 26.0 cm (L x W x H)
- Weight
- 6.35 kg (14 lbs)
- Fitting Type
- Bidirectional
- Other Attributes
- Stainless steel shaft, brass impeller, specially made for marine use
- Warranty
- 1 year
What’s in the Box
- 1 x Ford Water Pump
- 1 x Water Pump Gasket
- 1 x Stainless Steel Hub
- 1 x Hub Gasket
Installation Notes
- Disconnect the vessel's battery and fully drain the engine cooling system into a suitable container.
- Loosen the alternator or tensioner pulley to release tension on the serpentine belt, then remove the belt from the water pump pulley.
- Unscrew the bolts holding the pump pulley and remove it. Proceed to unbolt the old water pump from the engine block and carefully detach it.
- Thoroughly clean the engine's mounting surface to remove all traces of the old gasket and any sealant or corrosion.
- Position the new gasket on the engine block, then mount the new water pump. Hand-tighten the bolts, then torque them to the manufacturer's specifications in a star pattern.
- Re-install the pulley onto the new pump and refit the serpentine belt, ensuring it is correctly tensioned.
- Reconnect the battery. Refill the cooling system with the recommended coolant, then run the engine and carefully inspect for any leaks around the pump and hoses.
Troubleshooting & FAQ
How do I know if this pump fits my specific engine?
This pump fits Ford 302/351W V8 marine engines (5.0L/5.8L) from 1993–1996. The best way to confirm fitment is to match your existing part number to one of the equivalents listed in our Part Number Matrix.
What are the common signs of a failing water pump?
Signs of failure include coolant leaks from the pump's weep hole, a wobbling pulley, grinding or squealing noises from the pump bearing, and engine overheating. If you notice any of these symptoms, the pump should be inspected immediately.
Is this a raw water pump or an engine circulation pump?
This is an engine circulation pump. It circulates coolant within the engine's closed cooling system. It is not a raw water (sea water) pump, which draws water from outside the vessel.
What is the main difference between this aftermarket pump and an OEM one?
Functionally, there is no difference. This aftermarket pump is built to meet or exceed original equipment specifications using comparable materials like a brass impeller and stainless steel shaft, ensuring similar performance and longevity in a marine environment.
How often should a marine water pump be inspected or replaced?
While there is no fixed replacement interval, it is good practice to inspect the water pump annually or whenever the cooling system is serviced. Replace it at the first sign of a leak, bearing noise, or reduced cooling performance.
Is there any advantage to a brass impeller over a plastic one?
Yes. Brass impellers offer superior durability and resistance to corrosion, debris, and temperature extremes compared to plastic impellers, making them better suited for the harsh conditions of marine applications.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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