Complete Water Pump Service Kit for Mercury, Mariner & Force 6–15 HP Outboards – Replaces 46-42089A5
Complete Water Pump Service Kit for Mercury, Mariner & Force 6–15 HP Outboards – Replaces 46-42089A5 is backordered and will ship as soon as it is back in stock.
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Complete Water Pump Service Kit for Mercury, Mariner & Force 6–...
Complete Water Pump Service Kit for Mercury, Mariner & Force 6–15 HP Outboards – Replaces 46-42089A5 is backordered and will ship as soon as it is back in stock.
Product Details
This complete water pump service kit is designed for servicing the cooling system on selected Mercury, Mariner, and Force 6–15 HP outboard motors with standard gearcases. The corresponding application range includes both 2-stroke and selected 4-stroke models. Replacing worn water-pump components helps restore cooling-water circulation and reduce the risk of overheating.
The kit cross-references Mercury OEM water-pump kit number 46-42089A5 and aftermarket reference GLM 12051. Always compare the engine model, serial number, gearcase design, and original pump components before ordering.
- For selected 6, 8, 9.9, 10, and 15 HP applications.
- For standard gearcases; not for Bigfoot applications unless your engine documentation specifically confirms compatibility.
- Includes the pump housing, impeller, wear plate, gaskets, seals, base, retainer, and associated hardware listed below.
- Aftermarket replacement kit; Mercury and other brand names are used only to identify applicable engines and reference numbers.
Part Number Matrix
These are reference numbers associated with this water-pump kit. They should be used together with the engine and serial-number conditions below.
| Brand or Source | Part Number | Reference |
|---|---|---|
| Mercury | 46-42089A5 | OEM water pump kit reference |
| Mercury | 46-42089A4 | Earlier cross-reference found in product-number records |
| Mercury | 46-42089A3 | Earlier cross-reference found in product-number records |
| GLM | 12051 | Complete water pump service kit reference |
| Aftermarket | 96-261-01K | Product-number cross-reference; verify against the original assembly before ordering |
Engine & Model Compatibility
Fitment depends on the complete engine configuration, gearcase design, and serial number. The water-pump kit reference is cataloged for standard gearcases used with selected Mercury and Mariner 6–15 HP engines. The ranges below summarize the documented applications and are not a substitute for checking the engine serial number.
| Brand | Application | Rated HP | Stroke | Documented Range | Serial or Model Condition |
|---|---|---|---|---|---|
| Mercury / Mariner | Standard outboard models | 6, 8, 9.9, 10, 15 | 2-Stroke | 1986 and up | Check the exact model and serial number; examples include 0A197112 and up for some applications. |
| Mercury / Mariner | Standard outboard models | 6, 8, 9.9, 10, 15 | 2-Stroke | 1986 and up | Catalog occurrences include serial ranges such as 9461526–9792199 and 0A197112–0D280999, depending on horsepower and model. |
| Mercury / Mariner | 2-cylinder models | 8, 9.9, 15 | 4-Stroke | 1999 and up | Confirm the exact engine model and standard gearcase configuration. |
| Mercury / Mariner | 323 cc models | 9.9, 15 | 4-Stroke | Selected serial ranges | Cataloged examples include 0G760300–1B226999 and related ranges; verify the serial number before ordering. |
| Mercury / Mariner | International 4-stroke models | 8 and selected 13.5–15 | 4-Stroke | Selected serial ranges | Application varies by model and market; verify the original pump-kit number. |
| Force | Selected standard-gearcase applications | 6–15 | 2-Stroke | Model-dependent | Confirm the pump-kit reference and gearcase design against the engine serial number. |
Important: This kit is intended for standard gearcases. Do not use it for Bigfoot or other differently configured gearcases without confirmed fitment.
Technical Specifications
- Product Type
- Complete water pump service and rebuild kit
- Application
- Selected Mercury, Mariner, and Force 6–15 HP outboards
- Stroke Coverage
- Selected 2-stroke and 4-stroke applications
- Gearcase
- Standard gearcase; verify configuration before ordering
- Housing Material
- Metal alloy
- Impeller Material
- Neoprene rubber
- OEM Reference
- Mercury 46-42089A5
- Aftermarket Reference
- GLM 12051
- Package Type
- Multi-component water pump service kit
What's in the Box
- 1 × Water pump impeller
- 1 × Wear plate
- 1 × Pump gasket
- 3 × Additional pump gaskets
- 1 × Pump base
- 1 × Pump housing
- 1 × Retainer
- 2 × Oil seals
- 2 × Seals
- 1 × Screw
- 2 × Washers
- 1 × Quad ring
Component appearance and markings may vary by production batch. Compare the supplied parts with the original water-pump assembly before installation.
Installation Notes
- Disconnect the battery and place the engine in a secure service position.
- Remove the lower unit according to the engine manufacturer's service procedure. Take care with the shift shaft, driveshaft, and water tube.
- Remove the old water-pump housing and record the orientation of the impeller, gaskets, seals, and wear plate.
- Clean all mating surfaces and remove old gasket material without damaging the gearcase.
- Install the new seals, gaskets, wear plate, impeller, base, and housing in the correct order.
- Lubricate the impeller as recommended for the engine and rotate it in the correct direction while fitting the housing.
- Reinstall the lower unit, ensuring that the driveshaft, shift shaft, and water tube are correctly aligned.
- Tighten fasteners to the engine manufacturer's specifications, reconnect the battery, and test the engine with an appropriate water supply before operation.
Troubleshooting & FAQ
How do I confirm this kit fits my engine?
Check the engine brand, horsepower, stroke, model, serial number, and gearcase design. The original water-pump kit number should also correspond with 46-42089A5 or the applicable cross-reference. If your engine has a Bigfoot or other special gearcase, do not assume this kit will fit.
What are the signs of a worn water-pump impeller?
Common symptoms include overheating, a weak or intermittent tell-tale stream, reduced cooling-water flow, or cracked, brittle, or damaged impeller blades.
How often should the impeller be replaced?
Inspect the impeller as part of routine maintenance and replace it when the blades show wear, cracking, deformation, or loss of flexibility. Service intervals should follow the engine manufacturer's recommendations and may need to be shorter in saltwater or debris-heavy conditions.
Is this an impeller-only kit?
No. This listing is for a multi-component water pump service kit that includes the impeller and the housing, base, wear plate, gaskets, seals, and hardware listed in the package contents.
Is this an OEM part?
This is an aftermarket replacement kit. Mercury OEM numbers are shown only as application and cross-reference information.
Do I need to verify the serial number?
Yes. The same horsepower rating can use different water-pump components across model years, serial ranges, and gearcase designs. Confirm the serial number and original pump-kit reference before ordering.
Safety & Important Information
- Verify the engine model, serial number, stroke, gearcase type, and original component dimensions before purchase.
- Do not install this kit on a Bigfoot or non-standard gearcase unless fitment is specifically confirmed.
- Follow the engine manufacturer's service instructions and torque specifications.
- Professional installation is recommended if you are not experienced with lower-unit or water-pump service.
About Sea Sierra
- Marine Replacement Parts — Practical replacement components for routine outboard maintenance and repair.
- Application-Focused Listings — Product information is organized around engine, model, serial, and gearcase conditions.
- Service Support — Compare your original part and engine details carefully before installation.
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