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Description
Water Pump Impeller Repair Kit – Fits Tohatsu/Nissan 25–40 HP 2-Stroke (Replaces 361-87322-0)Water Pump Impeller Repair Kit Fits Tohatsu Nissan 2540 HP 2 Stroke (Replaces 361 87322 0) This water pump repair kit is designed for Tohatsu and Nissan 2540 HP 2 Stroke outboard engines (19962005). It is also compatible with select Mercury 2530 HP 4 Stroke EFI engines from 2002 and later (serial numbers 0R051710 and up). This is a complete service kit that serves as a direct replacement for the OEM assembly, containing all the necessary components
Water Pump Impeller Repair Kit – Fits Tohatsu/Nissan 25–40 HP 2-Stroke (Replaces 361-87322-0)
This water pump repair kit is designed for Tohatsu and Nissan 25–40 HP 2-Stroke outboard engines (1996–2005). It is also compatible with select Mercury 25–30 HP 4-Stroke EFI engines from 2002 and later (serial numbers 0R051710 and up).
This is a complete service kit that serves as a direct replacement for the OEM assembly, containing all the necessary components for a full water pump overhaul to restore your engine's cooling performance.
- Installation: Direct OEM Replacement
- Compatibility: Fits Tohatsu, Nissan, and Mercury outboard engines as specified in the tables below.
- Complete Kit: Includes a new impeller, wear plate, housing liner, gaskets, and bolts for a full service.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Tohatsu/Nissan | 361-87322-0 |
| Tohatsu/Nissan | 361873220 |
| Tohatsu/Nissan | 361873220M |
| Mercury | 853792A1 |
| Mercury | 853792T01 |
| Mercury | 853792A07 |
Compatible Engine Models
Confirm your engine model/year in the table below.
For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
Tohatsu & Nissan
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Tohatsu | M25C2 | 25 | 2-Stroke | 1996–2005 | 361-87322-0 |
| Tohatsu | M25C3 | 25 | 2-Stroke | 2002–2005 | 361-87322-0 |
| Tohatsu | M30A3 | 30 | 2-Stroke | 1996–2002 | 361-87322-0 |
| Tohatsu | M30A4 | 30 | 2-Stroke | 2002–2005 | 361-87322-0 |
| Tohatsu | M35C | 35 | 2-Stroke | 2002 | 361-87322-0 |
| Tohatsu | M40C | 40 | 2-Stroke | 1996–2004 | 361-87322-0 |
| Nissan | NS25C2 | 25 | 2-Stroke | 1996–2005 | 361-87322-0 |
| Nissan | NS25C3 | 25 | 2-Stroke | 2002–2005 | 361-87322-0 |
| Nissan | NS30A3 | 30 | 2-Stroke | 1996–2002 | 361-87322-0 |
| Nissan | NS30A4 | 30 | 2-Stroke | 2002–2005 | 361-87322-0 |
| Nissan | NS35C | 35 | 2-Stroke | 2002 | 361-87322-0 |
| Nissan | NS40C | 40 | 2-Stroke | 1996–2004 | 361-87322-0 |
| Nissan | NS40C2 | 40 | 2-Stroke | 2002–2004 | 361-87322-0 |
Mercury Marine
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Mercury | Sea Pro | 25 | 4-Stroke | 0R051710 & Up | 853792A07 |
| Mercury | EFI Standard | 25 | 4-Stroke | 0R106999 & Up | 853792A07 |
| Mercury | EFI JET | 25 | 4-Stroke | 0R165086 & Up | 853792A07 |
| Mercury | EFI Standard | 30 | 4-Stroke | 0R106999 & Up | 853792A07 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Water Pump Impeller Repair Kit |
| Installation | Direct OEM Replacement |
| Fuel Type | Gasoline |
| Housing Material | Marine-grade Materials (OEM Specification) |
| Warranty | 1 Year |
| Other Technical Attributes | Produced in ISO9002 certified factory (per aftermarket sources) |
Package Contents
- 1 x Water Pump Impeller (345-65021-0/47-161541)
- 1 x Key Driveshaft (332-65022-0)
- 1 x Wear Plate Stainless Steel (348-65025-0)
- 1 x Cup Liner Stainless Steel (348-65011-0)
- 1 x Gasket Set
- 4 x Bolts with Washers
Installation Guide
Professional installation is recommended. The following are general steps and may not be exact for your model.
- Disconnect the spark plug leads and the battery.
- Drain the gearcase lube from the lower unit.
- Remove the propeller.
- Unbolt and carefully slide the lower unit off the drive shaft housing.
- Remove the water pump housing bolts and slide the housing up the driveshaft.
- Take note of the old impeller's orientation, then remove it, along with the old gaskets, wear plate, and cup liner.
- Clean the mounting surfaces thoroughly.
- Install the new gasket and stainless steel wear plate.
- Slide the new impeller onto the driveshaft, turning the shaft clockwise to seat the vanes correctly. Install the drive key.
- Install the new cup liner and gasket, then reinstall the housing and tighten the bolts to the manufacturer's torque specs.
- Re-install the lower unit, propeller, and refill the gearcase with fresh lube.
- Reconnect the battery and test the engine's cooling function in water before operation.
Troubleshooting & FAQ
Q: How can I be sure this kit will fit my specific engine?
A: The best way is to match your engine's original part number to those listed in our "Part Number Cross-Reference" table. Also, carefully check your engine model, horsepower, and year/serial number against the "Compatible Engine Models" tables. For Mercury engines, use the provided serial number guide to be certain.
Q: What are the common signs that my water pump impeller needs to be replaced?
A: Key indicators include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "telltale" outlet port, and a brittle or cracked appearance on the old impeller upon inspection.
Q: How often should I replace my water pump impeller?
A: For preventative maintenance, it is generally recommended to service the water pump and replace the impeller every 1-2 years or every 100-200 hours of operation, especially if you frequently operate in sandy or silty water.
Q: Is this an OEM part or an aftermarket one?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy