3C8-65021-2 Water Pump Impeller for Nissan Tohatsu 40D 50D | JLM Marine

Water Pump Impeller for Nissan Tohatsu 40D 50D – OEM 3C8-65021-2

This water pump impeller is engineered for Nissan and Tohatsu 2-Stroke 40D and 50D outboard motors. Designed to maintain optimal cooling performance, this impeller ensures reliable water flow through your engine's cooling system, protecting against overheating and extending engine life.

This replacement impeller directly replaces OEM part numbers 3C8-65021-2, 3C8650212, and 3C8650212M, providing a cost-effective solution for routine maintenance or emergency repairs.

• 6-blade design with neoprene construction and nylon hub for durability
• Precise OEM dimensions: 50.40 mm diameter, 17.20 mm shaft
• Fits both 2-Stroke and 4-Stroke Nissan/Tohatsu 40-50 HP models (2002-2017)

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 × Outboard Impeller

Installation Guide

1. Disconnect the fuel line and remove the engine cowling to access the lower unit. Ensure the engine is off and cool before beginning work.
2. Remove the water pump housing bolts and carefully separate the housing from the lower unit. Take note of gasket orientation.
3. Extract the old impeller using needle-nose pliers or an impeller removal tool. Inspect the pump housing for debris, scoring, or wear.
4. Clean the pump chamber thoroughly with a soft cloth and remove any old gasket material. Check the wear plate and housing for damage.
5. Lubricate the new impeller blades with water pump grease or dish soap to ease installation and prevent tearing.
6. Insert the new impeller into the housing, ensuring the blades curve in the correct rotational direction (refer to your service manual).
7. Install a new gasket and wear plate if included or if the originals show signs of wear.
8. Reassemble the water pump housing, aligning all bolt holes. Torque bolts to manufacturer specifications in a crisscross pattern.
9. Reinstall the lower unit onto the engine, ensuring all seals and gaskets are properly seated.
10. Reconnect the fuel line and replace the cowling. Double-check all fasteners are secure.
11. Run the engine in a test tank or on-water and confirm strong water flow from the telltale (pee hole). Monitor engine temperature during initial operation.
12. Inspect for leaks around the pump housing and verify consistent cooling performance under load.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Nissan or Tohatsu engine?
A: Cross-reference your engine model and year with the compatibility table above. Verify your original impeller's OEM part number matches 3C8-65021-2, 3C8650212, or 3C8650212M. Measure the diameter (50.40 mm) and blade count (6) to ensure a precise match.

Q: How often should I replace my water pump impeller?
A: Most manufacturers recommend replacing the impeller every 2–3 years or 200–300 hours of operation, whichever comes first. If you notice overheating, weak telltale flow, or the engine has been run dry, inspect and replace the impeller immediately.

Q: What are the signs of a failing impeller?
A: Common symptoms include weak or absent water discharge from the telltale, engine overheating alarms, steam from the cowling, or reduced performance. Inspect the impeller if you experience any of these issues.

Q: Can I use this impeller on both 2-stroke and 4-stroke engines?
A: Yes, this impeller is compatible with both 2-stroke and 4-stroke Nissan and Tohatsu 40–50 HP models manufactured between 2002 and 2017, as listed in the compatibility table.

Q: What is the difference between this aftermarket impeller and the OEM version?
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.