Water Pump Impeller – Fits Tohatsu/Nissan Outboard 50-70HP (Replaces 353-65021-0, 353650210M)

Water Pump Impeller – Fits Tohatsu/Nissan Outboard 50-70HP (Replaces 353-65021-0, 353650210M)

This marine water pump impeller is designed to fit Tohatsu and Nissan 2-stroke outboard engines in the 45-70HP range, specifically models from the 45A, 50, 55B, and 70A2 series.

It serves as a direct replacement for Tohatsu part numbers 353-65021-0 / 353650210M, Nissan part numbers 353-65021-0 / 353650210M, and Sierra part number 18-45404.

• Installation Method: Direct OEM replacement
• Material Composition: Durable neoprene suitable for both saltwater and freshwater environments.
• Included Components: 1 x 6-Blade Water Pump Impeller

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 x Water Pump Impeller (Replaces 353-65021-0 / 353650210M)

Installation Guide

1. Disconnect Power: Disconnect the battery and spark plug wires to prevent accidental starting.
2. Access the Lower Unit: Remove the bolts securing the lower unit (gearcase) to the upper engine housing and carefully lower it.
3. Open the Water Pump Housing: Locate the water pump assembly on top of the gearcase and remove the housing bolts to expose the impeller.
4. Remove the Old Impeller: Note the rotational direction of the old impeller blades. Remove the old impeller, key, and gaskets.
5. Install the New Impeller: Clean the housing interior. Place the new key in the driveshaft slot and slide the new impeller on, turning the driveshaft in its normal rotational direction to bend the blades correctly.
6. Reassemble Housing: Install new gaskets and re-secure the water pump housing cover, tightening bolts to the manufacturer's specified torque.
7. Reattach Lower Unit: Carefully guide the lower unit back into place, ensuring the driveshaft and water tube align correctly. Secure with bolts.
8. Test Operation: Reconnect the battery and spark plugs. Start the engine in a water supply (using flushing muffs) and check for a steady stream of water from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Tohatsu or Nissan engine?

A: The best way to ensure fitment is to match the part number. This impeller replaces OEM part numbers 353-65021-0 and 353650210M. You can also check your engine's model and horsepower against the "Compatible Engine Models" list provided on this page.

Q: What are the signs of a failing water pump impeller?

A: Common signs include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, or visible damage to the impeller blades such as cracks, stiffness, or missing pieces.

Q: How often should I replace the water pump impeller?

A: For preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years, or after every 100-200 hours of use, depending on operating conditions (e.g., more frequently in saltwater or sandy/silty water).

Q: OEM vs. Aftermarket?

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 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.