Water Pump Impeller Repair Kit for Mercury/Mariner 30–60 HP 4-Stroke and Force 75 HP 2-Stroke Outboards
Water Pump Impeller Repair Kit for Mercury/Mariner 30–60 HP 4-Stroke and Force 75 HP 2-Stroke Outboards is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller Repair Kit for Mercury/Mariner 30–60 HP 4-Strok...
Water Pump Impeller Repair Kit for Mercury/Mariner 30–60 HP 4-Stroke and Force 75 HP 2-Stroke Outboards is backordered and will ship as soon as it is back in stock.
Product Details
This water pump impeller repair kit is designed for specified Mercury and Mariner 30–60 HP 4-stroke outboards and selected Force 75 HP 2-stroke, 3-cylinder models. It combines the impeller, housing, base, faceplate, gaskets, seals, key, guide tube, and related hardware for a water pump rebuild.
The kit is listed as a replacement for the following manufacturer and aftermarket references: Mercury 46-812966A12, 46-812966A10, 46-14334A3, 46-14334A2, 46-14334A1, 46-812966A6, 46-812966A5, 46-812966A4, and Sierra 18-3690. Reference numbers identify comparable part references; they do not replace model, year, and serial-number verification.
- Complete water pump rebuild kit with housing and related wear components.
- Intended as a direct-replacement repair solution for the listed applications.
- Includes stainless-steel pump housing and faceplate components as listed below.
Part Number Matrix
Use these references together with the engine compatibility information to confirm the correct application.
| Brand | Part Number |
|---|---|
| Mercury | 46-812966A12 |
| Mercury | 46-812966A10 |
| Mercury | 46-14334A3 |
| Mercury | 46-14334A2 |
| Mercury | 46-14334A1 |
| Mercury | 46-812966A6 |
| Mercury | 46-812966A5 |
| Mercury | 46-812966A4 |
| Sierra | 18-3690 |
Engine & Model Compatibility
The applications below reflect the listed model, horsepower, stroke, year, and serial-number conditions. Always compare the complete engine identification and the original water pump components before ordering.
| Brand | Model | Rated HP | Stroke | Years | Reference | Model and Serial Conditions |
|---|---|---|---|---|---|---|
| Mercury | F30 EFI | 30 | 4-Stroke | 1998+ | 46-812966A12 | 3-cylinder; S/N 1C109093 and up |
| Mercury | F35 EFI | 35 | 4-Stroke | 1998+ | 46-812966A12 | 4-cylinder; S/N 1C453840 and up |
| Mercury | F40 | 40 | 4-Stroke | 1998+ | 46-812966A12 | 3-cylinder; S/N 0P401000 and up, 1B227000–1B344306, or 1C000001 and up |
| Mercury | F40 EFI | 40 | 4-Stroke | 1998+ | 46-812966A12 | 3-cylinder; S/N 0P401000–0P515896, 1B227000–1B355027, or 1C000001 and up |
| Mercury | F40 EFI | 40 | 4-Stroke | 1998+ | 46-812966A12 | 4-cylinder; S/N 0P094500–1C453839, 0T409000–1B355222, 1C000001 and up, or 0T178500–0T598999 |
| Mercury | F40 Jet | 40 | 4-Stroke | 1998+ | 46-812966A12 | 4-cylinder EFI; S/N 1C051324 and up |
| Mercury | F40 Sea-Pro | 40 | 4-Stroke | 1998+ | 46-812966A12 | 4-cylinder; S/N 1C453840 and up |
| Mercury | F40 | 40 | 4-Stroke | 1998+ | 46-812966A12 | 4-cylinder; S/N 0P094500–0P206999 or 0T178500–0T598999 |
| Mercury | F50 EFI | 50 | 4-Stroke | 1998+ | 46-812966A12 | 4-cylinder; S/N 0P153500 and up, 0T409000–1B355222, 0P094500–0P206999, or 0T178500–0T598999 |
| Mercury | F50 | 50 | 4-Stroke | 1998+ | 46-812966A12 | 4-cylinder; S/N 0P094500–0P206999 or 0T178500–0T598999 |
| Mercury | F60 EFI | 60 | 4-Stroke | 1998+ | 46-812966A12 | 4-cylinder; S/N 0P153500–1C453839, 0T409000–1B355222, or 1C000001 and up |
| Mercury | F60 Sea-Pro | 60 | 4-Stroke | 1998+ | 46-812966A12 | 4-cylinder EFI; S/N 1C453840 and up |
| Mercury | F60 Formula 60 | 60 | 4-Stroke | 1998+ | 46-812966A12 | 4-cylinder EFI; S/N 1C104574 and up |
| Mercury | F60 | 60 | 4-Stroke | 1998+ | 46-812966A12 | 4-cylinder; S/N 0P094500–0P206999 or 0T178500–0T598999 |
| Force | 75 | 75 | 2-Stroke | 1988–1999 | 46-812966A12 | 3-cylinder; S/N 0E288000–0E344999 |
Technical Specifications
- Product Type
- Water pump impeller repair kit with housing
- Installation
- Direct replacement
- Housing and Faceplate Material
- Stainless steel
- Housing Color
- Silver/metallic
- Weight
- 0.67 kg (1.47 lb)
- Fitting Type
- Direct fit for the listed applications
- Application
- Water pump rebuild and cooling-system maintenance
What's in the Box
- 1 × Housing (14334A3)
- 1 × Guide tube/coupler (893857)
- 1 × Impeller (19453T)
- 2 × O-ring (805726)
- 1 × Key (19699)
- 3 × Seal (830749)
- 2 × Washer (8M0204720)
- 1 × Water pump base assembly (812966A7)
- 1 × Lower gasket (19701)
- 1 × Gasket (822189)
- 1 × Faceplate (19700A2)
- 4 × Washer (12-858234)
Installation Notes
- Disconnect the battery and shift linkage.
- Remove the lower unit or gearcase bolts and carefully separate the lower unit from the upper housing.
- Unbolt the old water pump housing and lift it from the driveshaft.
- Remove the old impeller, key, gaskets, and seals. Clean all mating surfaces thoroughly.
- Install the new gaskets, seals, and water pump base.
- Install the key on the driveshaft, then install the new impeller while turning the shaft clockwise so the vanes fold in the correct direction.
- Install the new housing and guide tube, making sure the seals are correctly seated.
- Torque the housing bolts according to the engine manufacturer's specifications.
- Reinstall the lower unit and align the driveshaft, shift shaft, and water tube correctly.
- Secure the lower-unit bolts to the manufacturer's specification.
- Reconnect the shift linkage and battery.
- Test the engine with an appropriate water supply, such as flushing muffs or a test tank, before normal operation.
Troubleshooting & FAQ
How do I confirm this kit is correct for my engine?
Check the engine brand, model, horsepower, stroke, year, and complete serial number against the compatibility table. The serial-number condition is important because similar horsepower models can use different water pump components.
Is this an OEM part?
No. This listing is for an aftermarket replacement kit. The OEM and aftermarket numbers shown are reference numbers used to help identify the intended application.
Does the kit include the housing?
Yes. The listed contents include the water pump housing, base assembly, faceplate, impeller, key, guide tube, gaskets, seals, and washers.
How often should the water pump impeller be replaced?
Impeller service intervals depend on the engine manufacturer's recommendations, operating hours, storage conditions, and whether the engine is used in saltwater or freshwater. Inspect the cooling system regularly and replace worn, cracked, hardened, or damaged components.
What are common signs of a failing water pump?
Possible symptoms include overheating at idle or low speed, a weak or missing tell-tale stream, and visible cracks, brittleness, or damaged vanes on the old impeller.
Is professional installation recommended?
Yes. Water pump service requires correct lower-unit removal, shaft alignment, seal installation, bolt torque, and post-installation cooling-system testing. Use the applicable service manual for detailed procedures and torque values.
Safety & Important Information
- Verify the engine model, year, stroke, serial number, and original component appearance before ordering.
- Do not operate the engine without an adequate water supply.
- Follow the applicable service manual for disassembly, torque values, lubrication, and testing.
- This is an aftermarket replacement kit, not an OEM component.
- Professional installation is recommended if you are not experienced with outboard lower-unit or water-pump service.
About Sea Sierra
- Marine Replacement Parts — Parts and kits selected for common outboard maintenance and repair applications.
- Application-Focused Listings — Model, horsepower, stroke, year, and serial-number information is provided to support fitment checks.
- Installation Awareness — Always compare the replacement parts with the original components and follow the applicable service documentation.
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