Water Pump Service Kit with Housing for Mercury/Mariner 30–70 HP 2-Stroke Outboards
Water Pump Service Kit with Housing for Mercury/Mariner 30–70 HP 2-Stroke Outboards is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Water Pump Service Kit with Housing for Mercury/Mariner 30–70 HP 2-...
Water Pump Service Kit with Housing for Mercury/Mariner 30–70 HP 2-Stroke Outboards is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Water Pump Service Kit with Housing is designed for selected Mercury and Mariner 2-stroke outboard applications from 30 to 70 HP. It is intended for water pump service and includes a replacement pump housing together with the service components required for the listed application.
The company application data covers Mercury/Mariner 30 Jet, 35 HP, 350, 35 HP 2-cylinder, 40 HP, 400, 402, 40 HP 4-cylinder, 45 Jet, 50 HP, 500, 50 HP 3-cylinder, 50 HP 4-cylinder, 60 HP 3-cylinder, 65 HP 3-cylinder, and 70 HP 3-cylinder models.
- Water pump service kit supplied with housing.
- For selected Mercury and Mariner 2-stroke outboards.
- Suitable for the applications and reference numbers listed below; verify the original component and engine identification before ordering.
Reference Number Matrix
The following manufacturer and aftermarket references are listed for application cross-reference. A reference number alone does not replace checking the complete engine model and serial information.
| Brand | Reference Number | Reference Type |
|---|---|---|
| Mercury Mariner | 46-60366A1 | Manufacturer reference |
| Mercury Mariner | 46-60366Q1 | Manufacturer reference |
| Mercury Mariner | 46-60366T1 | Manufacturer reference |
| Mercury Mariner | 46-77516A3 | Manufacturer reference |
| Mercury Mariner | 60366A1, 60366Q1, 32767A | Additional manufacturer references |
| GLM Marine | 12010 | Aftermarket reference |
| Sierra / SEI / West Marine | 18-3322, 18-3507 | Aftermarket references |
| Johnson Evinrude | 0509029, 0775451 | Additional listed reference numbers |
Engine & Model Compatibility
This kit is listed for the following Mercury and Mariner 2-stroke outboard applications. Model naming and fitment can vary by production range, so confirm the complete model designation and serial number before installation.
| Brand | Model or Application | Rated HP | Stroke | Fitment Note |
|---|---|---|---|---|
| Mercury / Mariner | 300, 30 Jet | 30 | 2-Stroke | Verify model and serial number |
| Mercury / Mariner | 35 HP, 350, 35 HP 2-Cylinder | 35 | 2-Stroke | Verify model and serial number |
| Mercury / Mariner | 40 HP, 400, 402 | 40 | 2-Stroke | Verify model and serial number |
| Mercury / Mariner | 40 HP 4-Cylinder | 40 | 2-Stroke | Verify model and serial number |
| Mercury / Mariner | 45 Jet | 45 | 2-Stroke | Verify model and serial number |
| Mercury / Mariner | 50 HP, 500, 50 HP 3-Cylinder, 50 HP 4-Cylinder | 50 | 2-Stroke | Verify model and serial number |
| Mercury / Mariner | 60 HP 3-Cylinder | 60 | 2-Stroke | Verify model and serial number |
| Mercury / Mariner | 65 HP 3-Cylinder | 65 | 2-Stroke | Verify model and serial number |
| Mercury / Mariner | 70 HP 3-Cylinder | 70 | 2-Stroke | Verify model and serial number |
Technical Specifications
- Product Type
- Water pump service kit with housing
- Application
- Selected Mercury and Mariner outboard engines
- Stroke
- 2-stroke applications listed in the compatibility section
- Horsepower Range
- 30–70 HP, subject to model and serial-number verification
- Brand Status
- Aftermarket replacement; not an original Mercury or Mariner component
What’s in the Box
- Water pump housing
- Water pump service components for the listed application
- Gaskets and sealing components as supplied for the applicable configuration
Component appearance and the exact gasket selection may vary by engine configuration. Match the supplied parts to the original water pump assembly before installation.
Installation Notes
- Disconnect the battery and remove the spark plug leads before beginning work.
- Support the outboard securely and remove the lower unit according to the engine manufacturer's service procedure.
- Remove the existing water pump housing and service components, noting their order and orientation.
- Clean the mating surfaces and inspect the driveshaft, water tube, keyway, and surrounding water-pump components for damage.
- Install the replacement gaskets and service components in the correct order for your engine configuration.
- Install the impeller with the vanes oriented according to the manufacturer's procedure, then install the replacement housing.
- Reinstall the lower unit, ensuring correct alignment of the driveshaft, shift shaft, and water tube.
- Tighten all fasteners to the engine manufacturer's specified torque.
- Reconnect the battery and spark plug leads, then test the engine with an adequate water supply.
- Confirm a strong tell-tale stream and check carefully for leaks or overheating before returning the boat to service.
Maintenance & Troubleshooting FAQ
What are the signs of a failing water pump?
Common warning signs include overheating, a weak or intermittent tell-tale stream, reduced cooling-water flow, or a brittle, cracked, swollen, or deformed impeller.
When should the water pump be serviced?
Inspect and service the water pump according to the engine manufacturer's maintenance schedule. Service intervals may need to be shorter in saltwater, sandy, silty, or otherwise abrasive operating conditions.
Does this product include the housing?
Yes. This listing is for a water pump service kit with housing. Confirm the housing shape and the applicable reference number against your original assembly before ordering.
How do I confirm fitment?
Check the complete engine brand, model designation, horsepower, stroke, and serial number. Compare the original water pump assembly and its manufacturer reference numbers with the information in this listing.
Are all listed reference numbers guaranteed to be interchangeable?
No. Reference numbers are provided for cross-reference and application research. Differences in model, production range, serial number, or component configuration can affect fitment.
Is this an OEM part?
No. This is an aftermarket replacement service kit. Mercury, Mariner, GLM, Sierra, SEI, West Marine, and Johnson Evinrude names and numbers are used only to identify applications or reference products where applicable.
Safety & Important Information
- Verify the engine model, stroke, horsepower, and serial number before ordering.
- Compare the replacement housing and service components with the original parts before installation.
- Use the correct service procedure and torque specifications for your engine.
- Do not operate the engine without an adequate cooling-water supply.
- Professional installation is recommended if you are not familiar with outboard lower-unit or water-pump service.
About Sea Sierra
- Marine Replacement Parts — Practical aftermarket components for common marine service applications.
- Application-Focused Listings — Product references and model information are provided to help you compare your original part.
- Service Support — Always verify model and serial-number details before installation.
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