Water Pump Impeller Kit – Fits Mercury Mariner Force 4-Stroke 30-60 HP (Replaces 46-812966A12, Sierra 18-3690)
Water Pump Impeller Kit – Fits Mercury Mariner Force 4-Stroke 30-60 HP (Replaces 46-812966A12, Sierra 18-3690) 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 Impeller Kit – Fits Mercury Mariner Force 4-Stroke 30-60...
Water Pump Impeller Kit – Fits Mercury Mariner Force 4-Stroke 30-60 HP (Replaces 46-812966A12, Sierra 18-3690) is backordered and will ship as soon as it is back in stock.
Product Details
This is a complete water pump impeller repair kit, specifically the Mercury Marine Water Pump Impeller Kit 47-19453T, designed for Mercury, Mariner, and Force 4-Stroke outboards from 30-60 HP (1998 and newer). It is compatible with both EFI and carbureted models, providing a reliable solution for maintaining your engine's cooling system.
This kit serves as a direct replacement for multiple part numbers, including Mercury series 47-19453T and 46-812966A12, as well as Sierra 18-3690, ensuring broad interchangeability.
- Engineered for direct-fit installation.
- Features a durable stainless steel impeller housing and a robust neoprene impeller.
- Includes the long tube seal (859770/893857) required for 4-stroke applications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 47-19453T / 47-19453T3 / 47-19453T2 / 47-19453T1 |
| Mercury | 46-812966A12 / 46-812966A11 / 46-812966A10 / 46-812966A6 / 46-812966A5 / 46-812966A4 |
| Sierra | 18-3690 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is designed for the following Mercury 4-Stroke outboard engines. Please verify your engine's serial number falls within the specified ranges.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | 30 EFI (3 CYL.) | 30 | 4-Stroke | 1998–Up (1C109093 & Up) | 46-812966A12 | |
| Mercury | 40 CARB (3 CYL.) | 40 | 4-Stroke | 1998–Up (0P401000 & Up) | 46-812966A12 | |
| Mercury | 40 CARB (3 CYL.) | 40 | 4-Stroke | 1998–Up (1B227000-1B344306) | 46-812966A12 | |
| Mercury | 40 CARB (3 CYL.) | 40 | 4-Stroke | 1998–Up (1C000001-1C018825) | 46-812966A12 | |
| Mercury | 40 CARB (3 CYL.) | 40 | 4-Stroke | 1998–Up (1C018826 & Up) | 46-812966A12 | |
| Mercury | 40 EFI (3 CYL.) | 40 | 4-Stroke | 1998–Up (1C043417 & Up) | 46-812966A12 | |
| Mercury | 40 EFI (3 CYL.) | 40 | 4-Stroke | 1998–Up (0P401000-0P515896) | 46-812966A12 | |
| Mercury | 40 EFI (3 CYL.) | 40 | 4-Stroke | 1998–Up (1B227000-1B344398) | 46-812966A12 | |
| Mercury | 40 EFI (3 CYL.) | 40 | 4-Stroke | 1998–Up (1C000001-1C043416) | 46-812966A12 | |
| Mercury | 40 EFI (4 CYL.) | 40 | 4-Stroke | 1998–Up (0P153500-0P400999) | 46-812966A12 | |
| Mercury | 40 EFI (4 CYL.) | 40 | 4-Stroke | 1998–Up (0P401000-0P515896) | 46-812966A12 | |
| Mercury | 40 EFI (4 CYL.) | 40 | 4-Stroke | 1998–Up (0T409000-1B344306) | 46-812966A12 | |
| Mercury | 40 EFI (4 CYL.) | 40 | 4-Stroke | 1998–Up (1C000001-1C050251) | 46-812966A12 | |
| Mercury | 40 EFI (4 CYL.) | 40 | 4-Stroke | 1998–Up (0P515897 & Up) | 46-812966A12 | |
| Mercury | 40 EFI (4 CYL.) | 40 | 4-Stroke | 1998–Up (1C050252 & Up) | 46-812966A12 | |
| Mercury | 40 EFI JET (4 CYL.) | 40 | 4-Stroke | 1998–Up (1C051324 & Up) | 46-812966A12 | |
| Mercury | 40 EFI SeaPro (4 CYL.) | 40 | 4-Stroke | 1998–Up (1C453840 & Up) | 46-812966A12 | Cat.# 90-8M0118807 |
| Mercury | 50 EFI (4 CYL.) | 50 | 4-Stroke | 1998–Up (0P153500-0P400999) | 46-812966A12 | |
| Mercury | 50 EFI (4 CYL.) | 50 | 4-Stroke | 1998–Up (0P401000-0P515896) | 46-812966A12 | |
| Mercury | 50 EFI (4 CYL.) | 50 | 4-Stroke | 1998–Up (0P153500-0P580772) | 46-812966A12 | Belgium-made |
| Mercury | 50 EFI (4 CYL.) | 50 | 4-Stroke | 1998–Up (0T409000-1B355222) | 46-812966A12 | USA-made, Cat.# 90-88387502 |
| Mercury | 50 EFI (4 CYL.) | 50 | 4-Stroke | 1998–Up (1C000001-1C050251) | 46-812966A12 | USA-made, Cat.# 90-883875003 |
| Mercury | 50 EFI (4 CYL.) | 50 | 4-Stroke | 1998–Up (0P515897 & Up) | 46-812966A12 | |
| Mercury | 50 EFI (4 CYL.) | 50 | 4-Stroke | 1998–Up (1C050252 & Up) | 46-812966A12 | |
| Mercury | 60 EFI (4 CYL.) | 60 | 4-Stroke | 1998–Up (0P153500-0P400999) | 46-812966A12 | |
| Mercury | 60 EFI (4 CYL.) | 60 | 4-Stroke | 1998–Up (0P401000-0P515896) | 46-812966A12 | |
| Mercury | 60 EFI (4 CYL.) | 60 | 4-Stroke | 1998–Up (0P153500-0P580772) | 46-812966A12 | Belgium-made |
| Mercury | 60 EFI (4 CYL.) | 60 | 4-Stroke | 1998–Up (0T409000-1B355222) | 46-812966A12 | USA-made, Cat.# 90-88387502 |
| Mercury | 60 EFI (4 CYL.) | 60 | 4-Stroke | 1998–Up (1C000001-1C453839) | 46-812966A12 | USA-made |
| Mercury | 60 EFI (4 CYL.) | 60 | 4-Stroke | 1998–Up (0P515897 & Up) | 46-812966A12 | |
| Mercury | 60 EFI (4 CYL.) | 60 | 4-Stroke | 1998–Up (1C050252 & Up) | 46-812966A12 | |
| Mercury | 60 EFI SeaPro (4 CYL.) | 60 | 4-Stroke | 1998–Up (1C453840 & Up) | 46-812966A12 | Cat.# 90-8M0118807 |
| Mercury | Formula 60 | 60 | 4-Stroke | 1998–Up (1C104574-1C782687) | 46-812966A12 | Cat.# 90-8M0083070 |
Technical Specs
- Product Type
- Water Pump Impeller Kit
- Installation
- Direct replacement
- Housing Material
- Stainless Steel Impeller Housing
- Impeller Material
- Neoprene
- Impeller Height
- 25.4 mm (1 inch)
- Impeller Diameter
- 79.4 mm (3-1/8 inches)
- Housing Diameter
- 87.4 mm (3.44 inches) behind propeller (standard lower unit)
- Tube Seal Model
- 859770/893857 (long tube) for 4-stroke applications
- Weight
- 0.65 kg (1.43 lbs)
- Warranty
- 30 Days
What’s in the Box
- 1 x Tube Seal (859770/8597701/893857)
- 1 x Pump Housing (14334A3)
- 1 x Impeller (47-19453T)
- 1 x Impeller Key (28-8M0032831)
- 1 x Gasket (27-822189)
- 1 x Wear Plate (19700A2)
- 1 x Gasket (27-19701)
- 1 x Pump Base (46-812966A7)
- 2 x Washer-Plastic (12-858234)
- 3 x Seal (26-830749)
- 2 x O-Rings (805726)
- 4 x Stainless Steel Washers
Installation Notes
- Disconnect the battery and shift the outboard into neutral.
- Remove the lower unit (gearcase) by unbolting it from the engine's midsection.
- Unbolt and remove the old water pump housing to access the impeller.
- Slide the old impeller off the drive shaft, removing the old key.
- Clean the housing and base surfaces, removing any old gasket material.
- Install the new gaskets, wear plate, key, and impeller. Lubricate the new impeller and housing interior with marine grease.
- Install the new housing, seals, and O-rings, ensuring a tight fit.
- Reinstall the lower unit, reconnect all linkages, and test the engine's cooling stream ("telltale") in water before operating.
Troubleshooting & FAQ
How do I know this kit is the correct one for my engine?
This kit is specifically for 30-60 HP 4-stroke Mercury models from 1998 and newer. The key identifier is the included long tube seal (893857). Always verify your engine's serial number against the compatibility list provided.
What are the signs of a failing water pump impeller?
Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "telltale" outlet, and a steam-like exhaust. If you notice any of these signs, inspect your water pump immediately.
How often should I replace my impeller?
As a preventative maintenance measure, it is recommended to replace your water pump impeller every 1 to 2 years, or every 100-200 hours of operation, depending on usage conditions (e.g., saltwater vs. freshwater).
Is a stainless steel housing better than a plastic one?
Yes, a stainless steel housing offers superior durability, corrosion resistance, and heat dissipation compared to standard plastic housings, contributing to a longer service life, especially in harsh saltwater environments.
What is the purpose of the long tube seal in this kit?
The long tube seal (859770/893857) is critical for ensuring a proper seal on 4-stroke models. Kits for 2-stroke engines typically use a shorter seal. Using the wrong seal can lead to water pressure loss and overheating.
Can I install this kit myself?
While DIY installation is possible for those with mechanical experience, professional installation is recommended to ensure all components are sealed correctly and torqued to specification, preventing leaks and ensuring proper cooling system function.
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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