Water Pump Impeller for Nissan/Tohatsu 45A2–70A2 Outboards – Replaces 353-65021-0, 353650210M, Sierra 18-45404
Water Pump Impeller for Nissan/Tohatsu 45A2–70A2 Outboards – Replaces 353-65021-0, 353650210M, Sierra 18-45404 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Water Pump Impeller for Nissan/Tohatsu 45A2–70A2 Outboards – Replac...
Water Pump Impeller for Nissan/Tohatsu 45A2–70A2 Outboards – Replaces 353-65021-0, 353650210M, Sierra 18-45404 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump impeller is designed for select Nissan and Tohatsu marine outboards in the 45A2 through 70A2 model range. It is supplied as one replacement impeller for restoring water-pump circulation during routine cooling-system service.
The impeller is listed as a replacement for Nissan/Tohatsu references 353-65021-0 and 353650210M. It is also cross-referenced with Sierra Marine 18-45404.
- Aftermarket replacement water pump impeller.
- Fits the Nissan/Tohatsu 45A2–70A2 fitment range listed below.
- Single impeller product; pump housing, gaskets, key, wear plate and other service parts are not included unless separately stated.
- Suitable for cooling-system maintenance in marine operating environments when correctly matched to the engine and existing pump components.
Part Number Matrix
Use the following references to compare the replacement part with your existing impeller and engine documentation.
| Brand or Source | Part Number | Reference Type |
|---|---|---|
| Nissan/Tohatsu | 353-65021-0 | OEM reference |
| Nissan/Tohatsu | 353650210M | OEM reference |
| Sierra Marine | 18-45404 | Aftermarket interchange reference |
Engine & Model Compatibility
This impeller is listed for Nissan/Tohatsu 45A2–70A2 outboards. The available company fitment record does not provide complete year, serial-number, shaft-length or individual engine-variant coverage, so confirm the exact OEM reference and compare the original impeller before ordering.
| Brand | Listed Fitment | Horsepower Range | Year / Serial Coverage | OEM Reference |
|---|---|---|---|---|
| Nissan | 45A2–70A2 | 45–70 HP range | Not specified | 353-65021-0 / 353650210M |
| Tohatsu | 45A2–70A2 range | 45–70 HP range | Not specified | 353-65021-0 / 353650210M |
Do not rely on horsepower alone for fitment. Check the model designation, OEM part number, impeller dimensions and pump configuration against your engine before installation. Year and serial-number applicability should be confirmed from the engine parts manual or an authorized dealer where applicable.
Technical Specs
- Product Type
- Water pump impeller
- Product Configuration
- Single replacement impeller; not a complete water-pump kit
- Application
- Select Nissan/Tohatsu 45A2–70A2 outboards
- OEM References
- 353-65021-0 and 353650210M
- Aftermarket Interchange
- Sierra Marine 18-45404
- Material, blade count and dimensions
- Verify against the product image and original impeller before ordering; these details are not specified in the company product record.
What’s in the Box
- 1 x Water pump impeller
The package does not include a gasket set, drive key, wear plate, pump housing, lubricant or complete water-pump assembly unless separately stated.
Installation Notes
- Disconnect the battery and place the engine in a safe service position. Follow the engine manufacturer's service instructions.
- Remove the gearcase or lower unit as required for access to the water-pump housing.
- Remove the water-pump housing and take out the old impeller, gasket components and drive key as applicable.
- Inspect the housing, wear plate, key, shaft and seals for wear, corrosion or damage. Replace damaged components before reassembly.
- Clean the pump housing and mating surfaces thoroughly.
- Install the correct gasket and drive key for your engine, then fit the new impeller in the same orientation as the original component.
- Use a suitable water-based installation lubricant or the lubricant specified by the engine manufacturer. Do not run the impeller dry.
- Reinstall the pump housing and tighten fasteners to the manufacturer's specified torque.
- Reinstall the lower unit, reconnect the shift linkage and secure all fasteners according to the service manual.
- Run the engine only with an adequate water supply, then verify a normal tell-tale stream and check carefully for overheating or leaks.
Troubleshooting & FAQ
How do I know if my impeller is failing?
Common signs include a weak or intermittent tell-tale stream, an overheating warning, elevated operating temperature or damaged, cracked, brittle or missing impeller blades. Stop operating the engine if overheating occurs and inspect the cooling system.
How often should I replace my impeller?
Inspect the impeller during the maintenance interval specified for your engine. Replacement timing depends on operating hours, storage conditions and exposure to sand, silt or saltwater. Replace it whenever the blades show wear, deformation or damage.
Will this fit my exact engine model and year?
The company fitment record lists Nissan/Tohatsu 45A2–70A2 outboards, but it does not provide a complete year or serial-number list. Confirm your exact model designation and match the OEM reference 353-65021-0 or 353650210M before ordering.
Does this include the key, gaskets or wear plate?
No. This listing is for one replacement impeller only. The drive key, gaskets, wear plate, pump housing and other components are not included unless specifically stated in the package contents.
Is this an OEM part?
No. This is an aftermarket replacement impeller intended to correspond with the listed Nissan/Tohatsu OEM references and Sierra Marine 18-45404 interchange reference.
Is lubricant required for installation?
Use the installation lubricant recommended by the engine manufacturer or a suitable water-based solution during installation, and never operate a new impeller dry. Follow the service manual for lubrication and assembly requirements.
Should I replace other water-pump parts at the same time?
Inspect the pump housing, wear plate, drive key, gaskets and seals whenever the impeller is replaced. Replace any component that is worn, scored, corroded or damaged.
Shipping speed and cost?
Shipping options, delivery estimates and applicable costs are shown at checkout based on the destination and service selected.
Warranty and returns?
Warranty and return eligibility are governed by the current store policies. Contact support with your order details if you need assistance.
Safety & Important Info
- Verify the engine model, OEM reference and original impeller configuration before purchase.
- Do not operate the engine without an adequate water supply.
- Do not run a newly installed impeller dry, even briefly.
- Replace damaged gaskets, keys, wear plates, housings or seals as required.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended when lower-unit removal or shift-linkage adjustment is required.
About Sea Sierra
- Marine Replacement Parts — We supply aftermarket components for routine marine maintenance and repair.
- Application-Focused Fitment — Compare the listed engine range and reference numbers with your original part before ordering.
- Support When You Need It — Contact our support team with your engine model and order details for product assistance.
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