Water Pump Service Kit with Housing – Fits Mercury Mariner 2-Stroke 4–9.8 HP
Water Pump Service Kit with Housing – Fits Mercury Mariner 2-Stroke 4–9.8 HP is backordered and will ship as soon as it is back in stock.
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Water Pump Service Kit with Housing – Fits Mercury Mariner 2-Stroke...
Water Pump Service Kit with Housing – Fits Mercury Mariner 2-Stroke 4–9.8 HP is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Service Kit with Housing is an aftermarket replacement for selected Mercury Mariner 2-stroke outboard water-pump applications. The service kit includes the water-pump housing and is intended to renew the pump assembly and help restore proper cooling-water circulation.
Company fitment information lists Mercury Mariner outboards rated at 4 HP, 4.5 HP, 6 HP, 7.5 HP, and 9.8 HP. The 9.8 HP application is commonly identified as Model 110. Confirm the complete engine model, serial-number range, and the original water-pump assembly before ordering.
- Water-pump service kit with housing.
- Designed for selected Mercury Mariner 2-stroke outboards.
- Helps restore water-pump performance during cooling-system service.
- Verify the original housing, impeller, and reference numbers before installation.
Part Number References
The following OEM and aftermarket references are listed for identification and cross-reference purposes. A reference number alone does not confirm fitment for every engine configuration.
| Brand or Source | Reference Number |
|---|---|
| Mercury Mariner | 46-70941A3 |
| Mercury Mariner | 46-46893A6 |
| Mercury Mariner | 47-22748 |
| Mercury Mariner | 46-70941A1 |
| GLM Marine | 12122 |
| Sierra / SEI / West Marine | 18-3446 |
| Sierra / SEI / West Marine | 18-3447 |
Engine Compatibility
Use the following compatibility information as a starting point. Mercury and Mariner applications can vary by model designation and serial-number range, so compare the original parts and engine identification label before purchase.
| Brand | Engine Type | Rated HP | Stroke | Model or Notes |
|---|---|---|---|---|
| Mercury Mariner | Outboard | 4 HP | 2-Stroke | Confirm model and serial number |
| Mercury Mariner | Outboard | 4.5 HP | 2-Stroke | Confirm model and serial number |
| Mercury Mariner | Outboard | 6 HP | 2-Stroke | Confirm model and serial number |
| Mercury Mariner | Outboard | 7.5 HP | 2-Stroke | Model 75 application; confirm serial number |
| Mercury Mariner | Outboard | 9.8 HP | 2-Stroke | Model 110 application; confirm serial number |
Technical Specifications
- Product Type
- Water pump service kit with housing
- Application
- Selected Mercury Mariner 2-stroke outboards
- Rated Horsepower Range
- 4 HP, 4.5 HP, 6 HP, 7.5 HP, and 9.8 HP
- Installation
- Replacement water-pump service installation
- Fitment Verification
- Match engine model, serial number, original housing, and reference number
What's in the Box
- Water-pump housing
- Water-pump service-kit components supplied for the listed application
Component appearance and included service parts can vary by application. Confirm the supplied components against the product image and your original assembly before beginning installation.
Installation Notes
- Switch off the engine, remove the ignition key, and follow the manufacturer's safety procedures.
- Confirm the engine model, serial number, and existing water-pump configuration before disassembly.
- Remove the lower unit according to the service manual for your specific outboard.
- Remove the water-pump cover and the old pump components. Note the impeller-vane orientation and the position of any locating parts.
- Clean the mating surfaces and pump cavity. Replace damaged sealing parts with the correct supplied parts or approved replacements.
- Install the new housing and service components in the correct order. Lubricate the impeller with clean water or a lubricant approved for the application; do not run a dry pump.
- Reinstall the pump cover and lower unit using the manufacturer's torque sequence and specifications.
- Test the engine in an appropriate water supply and confirm a steady cooling-water discharge before normal operation.
Maintenance and Troubleshooting
How do I confirm that this service kit fits my engine?
Check the engine brand, model designation, horsepower, stroke type, and serial number. Compare the original water-pump housing and impeller with the product image and compare your existing reference number with the references listed above.
What are the signs of a worn water-pump assembly?
A weak or missing tell-tale stream, overheating, intermittent cooling-water flow, or a damaged, brittle, cracked, or missing impeller vane can indicate that the water-pump assembly requires service.
Does this listing include the water-pump housing?
Yes. The company product specification identifies this as a water-pump service kit with housing. Confirm the exact component layout against the product image before installation.
Is this an OEM part?
This listing is for an aftermarket replacement service kit. The OEM and aftermarket numbers above are provided as application references and do not mean that the product is manufactured by Mercury, Mariner, GLM, Sierra, SEI, or West Marine.
Safety and Important Information
- Do not rely on horsepower alone to confirm fitment. Model and serial-number conditions must also match.
- Compare the original housing, impeller dimensions, locating features, and sealing arrangement before installation.
- Use the appropriate service manual and torque specifications for your engine.
- Professional installation is recommended if you are not experienced with outboard lower-unit or water-pump service.
- Do not operate an outboard with a suspected cooling-system fault or without confirming proper water flow after service.
About Sea Sierra
- Marine Replacement Parts — We supply aftermarket components for routine marine maintenance and repair.
- Application-Focused Listings — Product references and compatibility details are provided to help you compare your original part.
- Service Support — Review your engine identification and original assembly carefully before ordering or installing replacement parts.
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