SKU: 21979958434

Water Pump Impeller Repair Kit – Fits Tohatsu/Nissan 25–40 HP 2-Stroke (Replaces 361-87322-0)

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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.

  1. Disconnect the spark plug leads and the battery.
  2. Drain the gearcase lube from the lower unit.
  3. Remove the propeller.
  4. Unbolt and carefully slide the lower unit off the drive shaft housing.
  5. Remove the water pump housing bolts and slide the housing up the driveshaft.
  6. Take note of the old impeller's orientation, then remove it, along with the old gaskets, wear plate, and cup liner.
  7. Clean the mounting surfaces thoroughly.
  8. Install the new gasket and stainless steel wear plate.
  9. Slide the new impeller onto the driveshaft, turning the shaft clockwise to seat the vanes correctly. Install the drive key.
  10. Install the new cup liner and gasket, then reinstall the housing and tighten the bolts to the manufacturer's torque specs.
  11. Re-install the lower unit, propeller, and refill the gearcase with fresh lube.
  12. 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:
  1. 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
SKU: 21979958434

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Robert Ezerman
San Leandro, US
★★★★★ 5
Solid unit, not showy 9thank you)
Style: R-S202BL, Configuration: w/o Wire and Plug
FAST!! shipping, complete, well packaged, excellent price for Yamaha durability. Easy hook-up, normal sized manual (thanks again!). Smile, intuitive controls. Base and treble by front-panel pots. I would have paid extra for a lighted remote.
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Reviewed in the United States on July 7, 2024
T
Verified Purchase
terry velasco
Boise, US
★★★★★ 5
sounds good
Style: R-S202BL, Configuration: w/o Wire and Plug
good stereo for a good price
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Reviewed in the United States on August 17, 2025
S
Verified Purchase
Sharreen
Dallas, US
★★★★★ 1
This item was sold at a NEW price and it was CLEARLY USED.
Style: R-S202BL, Configuration: w/o Wire and Plug
Unfortunately I really didn’t get to operate this item due to the fact that it didn’t work. After I connected my speakers and plugged it in, I turned on the power switch and the lights came on, but no sound. No discredit to Yamaha, nor the item... this is on the seller. It was sold at a new price and it was clearly a used item. Upon opening the box, I noticed : 1. The power cord was wrapped with a dirty, pink hair band. 2. The unit was not in plastic like a new item. 3. The FM antenna was missing. 4. The remote had old, used batteries in it. This should not have been re-sold.
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Reviewed in the United States on February 9, 2021
B
Verified Purchase
Bill
Alexandria, US
★★★★★ 5
a cult that still goes on...
Style: R-S202BL, Configuration: w/o Wire and Plug
Update in 2023: I have to add that I made this ppurchase via Amazon and it arrived at me in mint condition (Amazon Renewed scheme with 90 days money back guaranteed). For hifi components, if it works for the first quarter, it will then work rest of years. Mine though opened box but mint in sense that both its cosmetics and functions work perfectly. I purchased beefier models of Yamaha same series, the As 301r and As 501r afterwards via Amazon. Other than delicacy, the AR 202 receiver's overall performance is comparable to its leveled up siblings... AR 202 has already become a legend in hifi history since 2018... Yet of course audiophile ears are more picky and won't stay still with this kit. Therefore I purchased the silvery stereo amps afterwards cux I knew prices would go up very high and it is now proven positively and more so... Grab one even if used as ye still may... The AR 202 has an extraordinarily energetic drive in stereo sound given it's the youngest brother in the family. It brought much glory to the whole brand indeed... Review in 2019: "...performs much better than the beefed up version 100v Yamaha A-S301 silver in way of responsive and agile bass, larger soundstage, impressive midrange and fine treble. no wonder it is the best selling amp in 2017 and 2018. i suppose the cult still goes on......"
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Reviewed in the United States on August 7, 2019
F
Verified Purchase
Frank from Baltimore
Pawtucket, US
★★★★★ 5
Well made, a solid connection.
Size: 6 Pairs / 12 pcs
I liked them. They really lock down on the speaker wire to make a firm connection. They seem well made and are easy to install. My system sounds great.
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Reviewed in the United States on April 1, 2026

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