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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sheilanat
Lake Worth, US
★★★★★ 4
Good Coverage But...
Asurion had me to package up my Ipad and send to them to research the problem with it overheating and cracking the screen near the home button. The turnaround was about 6 days from when i shipped it next day and them returning the device. When I began to setup the IPad the first thing I notice was an error message stating touch id could not be setup on the device (it worked previously) and the ipad still got hot when charging. I had to return it to them a second time to "resolve" the issue. They determined they couldn't fix the issue and returned the cost of the device. The only problem is you can't replace a device for what it cost at that time of purchase, especially now when prices have soared. They need to fix or replace the device at the cost of what iit costs at the time of replacement.
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Reviewed in the United States on January 8, 2023
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Amazon Customer
Battle Creek, US
★★★★★ 5
Must buy for your tablet!
Amazing service, cannot recommend enough! So easy to start a claim, and super fast turn around time, I was informed through every step.
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Reviewed in the United States on December 9, 2025
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Bradley Baer
San Leandro, US
★★★★★ 5
They sent me a Amazon gift card
I insured an iPad for my son and had it repaired multiple times from him stepping on it. Quick and fast repairs. The last time he accidentally damaged it they sent me an Amazon gift card for the full price I originally paid for it. I was able to use the gift card right away because it was digital. I used it on an iPad that was on sale for half the original price so I was able to get him the night light he always wanted. Best service available and I insured this iPad right away with them.
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Reviewed in the United States on November 10, 2023
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Che Perth
San Leandro, US
★★★★★ 1
They will do anything to get out of fixing or replacing your item.
I bought a refurbished Samsung Galaxy Tablet S6 from Amazon through Affirm. I've already had the tablet for nearly 3 months. The tablet is defective. After barely 3 months it won't charge. I attempted to file a claim. The Asurion website tells me to return the item. Samsung doesn't make these tablets anymore. You cannot buy a brand new tablet of this model. They aren't sold online. The reason I bought the warranty which was over $100 is so that Asurion will fix the tablet if there is a problem. They were unwilling to make any effort to repair or fix this rare tablet. The website says to return the item. This is a lengthy return process. Amazon will not give me a QR code or let me print a label that I can take to a local UPS store. The only place Amazon will let me drop off the item is 2 or 3 towns away. The only option Amazon is giving me is to have UPS come pick up the tablet without giving me a label. I had to purchase a box from UPS and have them package it for me without providing me a label because Amazon says I don't need one. On the first attempt the UPS guy wasn't able to pickup the item because they need a special kind of form and my UPS driver didn't have the form. I have to wait until a UPS driver with the proper form is able to pick up my item before they can start the return process. Now I can't buy a Samsung Galaxy Tablet S6 from Amazon unless I want to go through this or a similar process every time an Amazon 3rd party seller sells me a defective product. Thanks for nothing Asurion. I'm going to start buying my electronics in person from Best Buy. They sell electronics that work and they immediately replace damaged and defective items that are under warranty. Amazon should ban Asurion from selling warranties on their website. They are selling warranties that they have no intention of providing the end product for. This is the second I've had a problem with Asurion. The first time I had a problem with a pair of headphones purchased through Amazon that were covered by my Asurion warranty that I had purchased. Asurion wouldn't help me and directed me to try and use the manufacturer warranty. When I buy a warranty from someone it's because I want the seller of the warranty to solve my problem. Not tell me to return the item or direct me to use the manufacturer warranty. It's not my fault the refurbisher couldn't make the tablet function properly for longer than 3 months.
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Reviewed in the United States on October 14, 2022
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Daniel Alvarez
Natrona Heights, US
★★★★★ 5
Apple is number one
Style: Wi-Fi, Size: 128GB, Color: Blue, Configuration: Without AppleCare+
The best iPad it’s worth the money it works perfectly fine I think the battery life is fine, but it probably needs a little bit of work, I would choose Apple anytime of the week. The durability is perfect and everything and the gameplay is absolute amazing. this is also for personal use and probably college use. I’m probably going to use this for college as well.
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Reviewed in the United States on June 5, 2026

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