Water Pump Housing Kit – Fits Mercury/Mariner/Johnson/Evinrude 30-70 HP (Replaces 46-60366T1)
Water Pump Housing Kit – Fits Mercury/Mariner/Johnson/Evinrude 30-70 HP (Replaces 46-60366T1) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Pump Housing Kit – Fits Mercury/Mariner/Johnson/Evinrude 30-7...
Product Details
This aftermarket Water Pump Housing Kit is designed for a broad range of 2-stroke Mercury, Mariner, Johnson, and Evinrude outboard engines, rated from 30 to 70 HP. It provides a reliable, direct-fit replacement for upper water pump housing assemblies on models manufactured between 1960 and 1997, including various JET and multi-cylinder configurations.
The kit serves as an interchange for multiple OEM part numbers, including Mercury 46-60366T1, Johnson/Evinrude 0775451, and others, ensuring wide compatibility with vintage and classic outboards.
- Installs as a direct replacement for specified OEM parts.
- Engineered for use in marine environments.
- Includes the upper water pump housing assembly required for a complete service.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 32767A1 |
| Mercury | 46-60366Q1 |
| Mercury | 46-60366T1 |
| Mercury | 46-77516A3 |
| Mercury | 60366A1 |
| Mercury | 60366Q1 |
| Johnson/Evinrude | 0509029 |
| Johnson/Evinrude | 0775451 |
| GLM | 12010 |
| Sierra | 18-3322 |
| Sierra | 18-3507 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mariner owners, this part fits specific 2-stroke models from 30-70 HP produced between 1960 and 1997. Please verify your engine's cylinder count and year.
For Johnson/Evinrude owners, this housing is compatible with models that use OEM part numbers 0509029 or 0775451. Specific years and models are not fully documented, so cross-reference is critical.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | JET | 30 | 2-Stroke | 1994–1997 | 46-60366T1 | |
| Mercury/Mariner | Various | 35 | 2-Stroke | 1984–1989 | 46-60366T1 | 3 Cylinder |
| Mercury/Mariner | Various | 40 (402/400) | 2-Stroke | 1960–1983 | 46-60366T1 | |
| Mercury/Mariner | Various | 40 | 2-Stroke | 1989+ | 46-60366T1 | 4 Cylinder |
| Mercury/Mariner | Various | 45 | 2-Stroke | 1986 | 46-60366T1 | 4 Cylinder |
| Mercury/Mariner | Various | 50 | 2-Stroke | 1968–1987 | 46-60366T1 | |
| Mercury/Mariner | Various | 60 | 2-Stroke | 1984–1987 | 46-60366T1 | 3 Cylinder |
| Mercury/Mariner | Various | 70 | 2-Stroke | 1977–1983 | 46-60366T1 | |
| Johnson/Evinrude | Various | 30-70 | 2-Stroke | 0509029, 0775451 | Compatible with models that accept these OEM numbers |
Technical Specs
- Product Type
- Water Pump Housing Kit
- Installation
- Direct replacement for specified engines
- Other Technical Attributes
- Upper water pump housing assembly
- Dimensions
- 4.5″ L × 2.63″ W × 4.88″ H
What’s in the Box
- 1 x Water Pump Housing
- Associated Gaskets and Seals
Installation Notes
- Disconnect the battery and remove the negative terminal to prevent accidental starting.
- Shift the outboard into neutral and remove the lower unit (gearcase) bolts.
- Carefully lower and separate the gearcase from the driveshaft housing.
- Unbolt and remove the old water pump housing, noting the orientation of all components.
- Clean the mounting surface and driveshaft area thoroughly, removing any old gasket material.
- Install the new gaskets, housing, and any other included components from the kit.
- Apply a light coat of marine grease to the new impeller (if replacing) and inner housing walls.
- Slide the new housing assembly down the driveshaft, ensuring the key engages correctly.
- Torque the housing bolts to the manufacturer's specified values.
- Reinstall the lower unit, ensuring the driveshaft, shift shaft, and water tube are properly aligned.
- Secure the lower unit with its bolts and reconnect the battery.
- Test the engine using a water source (flushing attachment or in water) to confirm proper water flow from the tell-tale outlet.
Troubleshooting & FAQ
How can I confirm this housing fits my specific engine?
The best method is to match your engine's original part number to one listed in our Part Number Matrix. If you cannot find it, consult the Engine & Model Compatibility table, paying close attention to your motor's brand, horsepower, and year range.
What are the signs of a failing water pump housing?
Common signs include a weak or non-existent stream from the tell-tale (water outlet), engine overheating alarms, and visible cracks, warping, or scoring on the old housing upon inspection. Reduced cooling performance can cause severe engine damage.
How often should I inspect or replace the water pump assembly?
As a general maintenance rule, the entire water pump assembly, including the impeller and housing, should be inspected every 100-200 hours of operation or at least once a year, whichever comes first. Replace components if any wear is visible.
Does this kit include the impeller?
This is a housing kit. It contains the housing and necessary gaskets/seals for installation. The impeller is typically sold separately or as part of a complete water pump repair kit. Check the "What's in the Box" section for a list of included items.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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