Water Pump Impeller – Fits Mercury/Mercruiser/OMC/Johnson/Evinrude 65-225 HP (Replaces 47-89984T4)
Water Pump Impeller – Fits Mercury/Mercruiser/OMC/Johnson/Evinrude 65-225 HP (Replaces 47-89984T4) 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.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Pump Impeller – Fits Mercury/Mercruiser/OMC/Johnson/Evinrude ...
Product Details
This aftermarket Water Pump Impeller – Fits Mercury/Mercruiser/OMC/Johnson/Evinrude 65-225 HP (Replaces 47-89984T4) is a crucial component for maintaining proper engine cooling. It is designed for a wide range of Mercury/Mercruiser (1963–1988), Johnson/Evinrude, and OMC outboard and sterndrive engines from 65 to 225 HP, including V6, L4, and L6 models.
It serves as a direct replacement for multiple OEM and aftermarket part numbers, including Mercury 47-89984T4, OMC 0775450, Force 47-F69406, and GLM 89840, ensuring broad compatibility for engine maintenance and repair.
- Engineered for direct-fit installation in compatible water pump housings.
- Constructed from durable neoprene rubber with a metal insert for longevity.
- Features a 6-blade design to ensure optimal water flow and cooling efficiency.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 47-89984T4 |
| Mercury | 47-89984B2 |
| Mercury | 47-89984T3 |
| Mercury | 899842 |
| Mercury | 899844 |
| Mercury | 89984B2 |
| Mercury | 46-89984Q5 |
| Mercury | 47-89984Q5 |
| Mercury | 47-89984T5 |
| Mercury | 47-89984T6 |
| Mercury | 803631T |
| OMC | 0508383 |
| OMC | 0775450 |
| OMC | 077546 |
| Force | 47-F69406 |
| Force | 47-F803631 |
| Aftermarket | 18-3017 |
| Aftermarket | CEF500313G |
| Aftermarket | 9-45306 |
| Aftermarket | GLM89840 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This impeller is confirmed to fit a wide range of Mercury & Mercruiser models produced between 1963 and 1988. See the table for specific engine series.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | Various | 65 | 2-Stroke | 1963–1976 | 47-89984T4 | |
| Mercury | Various | 70 | 2-Stroke | 1961 | 47-89984T4 | |
| Mercury | Various | 75 | 2-Stroke | 1984–1988 | 47-89984T4 | |
| Mercury | 4-cylinder | 80 | 2-Stroke | 1969–1983 | 47-89984T4 | |
| Mercury | 4-cylinder (850XS) | 85 | 2-Stroke | 1973–1977 | 47-89984T4 | |
| Mercury | 6-cylinder | 90 | 2-Stroke | 1978–1986 | 47-89984T4 | |
| Mercury | 6-cylinder | 95 | 2-Stroke | 1966–1967 | 47-89984T4 | |
| Mercury | 1000SS | 100 | 2-Stroke | 1962–1969 | 47-89984T4 | |
| Mercury | 105JET | - | 2-Stroke | 1966–1988 | 47-89984T4 | |
| Mercury | 1100/1150/1250/1350/1400/1500 | 110–150 | 2-Stroke | 1966–1988 | 47-89984T4 | 6-cylinder engines |
| Mercury | V135 CARB | 135 | 2-Stroke | 1986–1988 | 47-89984T4 | |
| Mercury | V135 EFI | 135 | 2-Stroke | 1998 | 47-89984T4 | |
| Mercury | 140JET | - | 2-Stroke | 1994–1995 | 47-89984T4 | |
| Mercury | V150 CARB | 150 | 2-Stroke | 1978–1985 | 47-89984T4 | |
| Mercury | V150 CARB/EFI/DFI | 150 | 2-Stroke | 1986–1988 | 47-89984T4 | |
| Mercury | V150 XR2/4/6, MagII | 150 | 2-Stroke | 1978–1988 | 47-89984T4 | |
| Mercury | V175 (V1750) | 175 | 2-Stroke | 1976–1988 | 47-89984T4 | |
| Mercury | V175/V200 CARB/EFI/DFI | 175–200 | 2-Stroke | 1985–1988 | 47-89984T4 | |
| Mercury | V200 | 200 | 2-Stroke | 1978–1981 | 47-89984T4 | |
| Mercury | V220 LASER | 220 | 2-Stroke | - | 47-89984T4 | |
| Mercury | V225 2.4L | 225 | 2-Stroke | - | 47-89984T4 | |
| Mercruiser | MC I & Alpha I | - | - | - | 47-89984T4 | Gear housing components |
Fitment for OMC, Johnson, Evinrude, and Force engines is based on cross-referenced part numbers. Verify your OEM part number before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| OMC/Johnson/Evinrude | Various | 75–90 | 2-Stroke | - | 0508383, 0775450 | Force branded equivalent 47-F69406 |
| OMC/Johnson/Evinrude | Various | 120–140 | 2-Stroke | - | 0508383, 0775450 | Force branded equivalent 47-F69406 |
| OMC/Johnson/Evinrude | Various | 150 | 2-Stroke | - | 0508383, 0775450 | Force branded equivalent 47-F69406 |
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Force | Various | 75 | 2-Stroke | - | 47-F694065, 47-F803631 | |
| Force | Various | 90 | 2-Stroke | - | 47-F694065, 47-F803631 | |
| Force | Various | 120 | 2-Stroke | - | 47-F694065, 47-F803631 | |
| Force | Various | 140 | 2-Stroke | - | 47-F694065, 47-F803631 | |
| Force | Various | 150 | 2-Stroke | - | 47-F694065, 47-F803631 |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct replacement
- Dimensions
- Shaft: 22.3 mm (A) × Diameter: 60 mm (B) × Width: 33.8 mm (C)
- Material
- Neoprene rubber with metal insert
- Number of Blades
- 6
- Keyway
- Yes
- Housing Compatibility
- Alpha One, MC I, MR
What’s in the Box
- 1 x Water Pump Impeller (Replaces 47-89984T4)
Installation Notes
- Disconnect the battery to prevent accidental starting.
- Place the outboard motor in the tilt position and drain the gearcase oil.
- Remove the lower unit (gearcase) by unbolting it from the engine's midsection.
- Locate and remove the bolts securing the water pump housing.
- Slide the old impeller off the driveshaft, noting the keyway's position.
- Clean the housing and wear plate, inspecting for scoring or damage. Replace if necessary.
- Install the new keyway and slide the new impeller onto the driveshaft. Turn the shaft clockwise to seat the blades correctly inside the housing.
- Reinstall the water pump housing, ensuring a proper seal.
- Reattach the lower unit to the engine, refill the gearcase oil, and reconnect the battery.
- Start the engine in a water supply (using muffs or in the water) and verify a strong, steady stream of water from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this impeller fits my engine?
The best way to confirm fitment is to check your engine's original part number. Cross-reference it with the numbers in our Part Number Matrix. You can also use the Engine & Model Compatibility tables, but always prioritize matching the part number from your existing impeller or service manual.
What are the signs of a failing water pump impeller?
Common signs include a weak or no water stream from the "tell-tale" outlet, engine overheating alerts or steam from the engine cowling, and a dry, cracked, or brittle appearance of the impeller blades upon inspection.
How often should I replace my impeller?
For most recreational boats, it is recommended to inspect the impeller annually and replace it every 1-2 years, regardless of appearance. For boats used in saltwater or sandy/silty conditions, annual replacement is strongly advised.
Does this package include gaskets and seals?
No, this listing is for the impeller only, as pictured. Complete water pump repair kits, which include gaskets, seals, and wear plates, are sold separately.
Is the keyway included with the impeller?
The keyway is typically sold separately or as part of a complete pump kit. This package contains only the impeller. Please verify if your old keyway is reusable or if you need to purchase a new one.
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.
Payment & Security
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