Water Pump Impeller Kit – Fits Mercury/Mariner 30–75 HP (Replaces 47-19453T, 47-19453)
Water Pump Impeller Kit – Fits Mercury/Mariner 30–75 HP (Replaces 47-19453T, 47-19453) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Pump Impeller Kit – Fits Mercury/Mariner 30–75 HP (Replaces 4...
Product Details
This Water Pump Impeller Kit is an aftermarket replacement part designed for a wide range of Mercury/Mariner (30–75 HP) and Force (70–75 HP) outboard motors from 1991 to 2021. It fits both 2-stroke and 4-stroke models, including those with standard and BigFoot gearcases, ensuring reliable engine cooling performance.
This kit is a direct replacement for multiple OEM and aftermarket part numbers, including Mercury/Mariner 47-19453T, 47-19453T1, 47-19453T2, 47-19453T3, Quicksilver 19453Q2, Sierra 18-8900, Mallory 9-45301, GLM 12044, and SEI Marine 96-265-03AK.
- Engineered with a high-quality rubber compound resistant to saltwater degradation.
- Includes the impeller, key, plate, gaskets, and other hardware for a complete service.
- Installation requires disassembly of the water pump housing.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury/Mariner | 47-19453T |
| Mercury/Mariner | 47-19453T1 |
| Mercury/Mariner | 47-19453T2 |
| Mercury/Mariner | 47-19453T3 |
| Quicksilver | 19453Q2 |
| Sierra | 18-8900 |
| Mallory | 9-45301 |
| GLM | 12044 |
| SEI Marine | 96-265-03AK |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mariner models, verify your engine’s horsepower, year, and serial number (S/N) range to ensure an exact match. Some models, especially around the transition years, have specific requirements.
For Force models, this kit fits 70 HP and 75 HP engines manufactured between 1995 and 1999.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury/Mariner | Standard Gearcase | 30 HP Jet | 4-Stroke | 1994–1995 | 47-19453T | S/N 0D000750 & up |
| Mercury/Mariner | Standard Gearcase | 35 HP | 4-Stroke | 1996–2021 | 47-19453T | EFI models |
| Mercury/Mariner | Standard Gearcase | 40 HP | 2-Stroke | 1991–1997 | 47-19453T | 3-cylinder models |
| Mercury/Mariner | Standard Gearcase | 40 HP | 4-Stroke | 1999–2021 | 47-19453T | Including EFI & carbureted models |
| Mercury/Mariner | Standard Gearcase | 40 HP EFI Jet | 4-Stroke | 1999–2021 | 47-19453T | Seapro models |
| Mercury/Mariner | Standard Gearcase | 45 HP | 2-Stroke | 1994–1995 | 47-19453T | 3-cylinder Jet (S/N 0D000750 & up) |
| Mercury/Mariner | Standard Gearcase | 50 HP | 2-Stroke | 1991–1997 | 47-19453T | 3-cylinder (USA: S/N 0D000750-0G589999, Belgian: 9683055-99773099) |
| Mercury/Mariner | Standard Gearcase | 50 HP | 4-Stroke | 1999–2021 | 47-19453T | Including EFI models |
| Mercury/Mariner | Standard Gearcase | 55 HP | 2-Stroke | 1996–1997 | 47-19453T | 3-cylinder (USA: S/N 0D000750 & up, Belgian: 9741042 & up) |
| Mercury/Mariner | Standard Gearcase | 55 HP | 4-Stroke | 2000–2021 | 47-19453T | Including EFI models |
| Mercury/Mariner | Standard Gearcase | 60 HP | 2-Stroke | 1991–1995 | 47-19453T | 3-cylinder Std (USA: S/N 0D000750 & up, Belgian: 9683055 & up) |
| Mercury/Mariner | Standard Gearcase | 60 HP | 4-Stroke | 2000–2021 | 47-19453T | Including EFI models |
| Mercury/Mariner | BigFoot Models | 60 HP | 4-Stroke | 2000–2021 | 47-19453T | BigFoot models (verify fitment) |
| Mercury/Mariner | Standard Gearcase | 70 HP | 4-Stroke | 1998–2021 | 47-19453T | Including BigFoot models |
| Mercury/Mariner | Standard Gearcase | 75 HP | 4-Stroke | 1998–2021 | 47-19453T | Including BigFoot models |
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Force | Standard Gearcase | 70 HP | 2-Stroke | 1995–1999 | 47-19453T | |
| Force | Standard Gearcase | 75 HP | 2-Stroke | 1995–1999 | 47-19453T |
Technical Specs
- Product Type
- Outboard Water Pump Impeller
- Installation
- Direct replacement, requires water pump housing disassembly
- Housing Material
- Rubber impeller with metal insert
- Housing Color
- Black
- Other TechnicalAttributes
- High-quality rubber compound resistant to salt water degradation
What’s in the Box
- 1 x Water Pump Impeller (Replaces 47-19453T)
- 1 x Impeller Key
- 1 x Plate (Replaces 19700A2)
- 1 x Guide Tube/Coupler (Replaces 859770/8597701/893857)
- 2 x Washer (Replaces 12-858234)
- 1 x Gasket Upper (Replaces 27-822189)
- 1 x Gasket Lower (Replaces 27-19701)
- 1 x O-Ring
Installation Notes
- Disconnect the battery and shift the outboard into neutral.
- Place a drain pan under the gearcase and remove the drain/vent screws to drain the gear oil.
- Remove the bolts securing the lower unit (gearcase) to the upper driveshaft housing.
- Carefully lower the gearcase to expose the water pump assembly.
- Remove the nuts or bolts securing the water pump housing cover and lift it off.
- Slide the old impeller off the driveshaft, taking note of the flat spot for the impeller key.
- Clean the housing and plate. Install the new gaskets, plate, impeller, and key from the kit.
- Reassemble the housing, ensuring the impeller vanes are correctly oriented (typically clockwise).
- Reinstall the lower unit, refill with fresh gear oil, and reconnect the battery.
- Start the engine in a water supply and verify a strong, consistent water stream from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this impeller kit will fit my engine?
The most reliable method is to verify your outboard's model, horsepower, and serial number against the compatibility tables provided. Different gearcases (like Standard vs. BigFoot) can use different parts, so cross-referencing is essential.
What are the signs of a failing water pump impeller?
Common symptoms include the engine overheating at idle or low speeds, a weak or intermittent water stream from the "tell-tale" outlet, or an audible alarm from the engine's warning system. If you notice any of these, inspect the impeller immediately.
How often should I replace my water pump impeller?
As a preventative maintenance measure, most manufacturers recommend replacing the impeller every 1 to 2 years or every 100-200 hours of operation, whichever comes first. This interval can be shorter if you operate in sandy, silty, or saltwater environments.
Does this kit fit both 2-stroke and 4-stroke models?
Yes, this specific kit is designed for a variety of both 2-stroke and 4-stroke Mercury, Mariner, and Force outboards as detailed in the compatibility list. Always check the specific model and year range for your engine.
The kit includes multiple gaskets and seals. Will I use all of them?
This kit is designed to cover multiple engine variations, so you may have leftover gaskets or seals after completing your installation. Use only the parts that match the ones you removed from your specific water pump housing.
What is the difference between an OEM and an aftermarket part?
This listing is an aftermarket replacement, not an OEM (Original Equipment Manufacturer) part. It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency.
What are the shipping speed and cost?
We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available for your location.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against 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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