Water Pump Impeller Kit – Fits Mercury/Mariner Outboard 30-70 HP (Replaces 47-89983Q1, 47-89983T1, 47-89983T2)
Water Pump Impeller Kit – Fits Mercury/Mariner Outboard 30-70 HP (Replaces 47-89983Q1, 47-89983T1, 47-89983T2) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Water Pump Impeller Kit – Fits Mercury/Mariner Outboard 30-70 HP (R...
Water Pump Impeller Kit – Fits Mercury/Mariner Outboard 30-70 HP (Replaces 47-89983Q1, 47-89983T1, 47-89983T2) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller Kit provides a direct replacement solution for various Mercury and Mariner outboard engines, specifically 2-stroke models from 30 HP to 70 HP manufactured from the 1970s through the late 1990s. It is engineered to restore cooling system performance and prevent engine overheating.
It serves as a direct interchange for Mercury parts 47-89983Q1, 47-89983T1, and 47-89983T2, as well as aftermarket references like Sierra 18-3207.
- Designed for a vehicle-specific fit to ensure proper installation.
- Includes essential gaskets and O-rings for a complete service.
- Features a machined exterior finish for precise alignment and durability.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number | Notes |
|---|---|---|
| Mercury | 47-89983Q1 | Original equipment reference. |
| Mercury | 47-89983T1 | Superseded part number. |
| Mercury | 47-89983T2 | Superseded part number. |
| Sierra | 18-3207 | Aftermarket cross-reference. |
| SLSRPMT | 47-89983Q1 | Aftermarket cross-reference. |
Engine & Model Compatibility
Confirm your engine model and serial number in the table below to ensure an exact match.
This kit is designed for a wide range of Mercury and Mariner 2-stroke outboards and jet drives. Checking your engine's serial number against the listed ranges is critical for verifying compatibility.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury/Mariner | Outboard | 30 | 2-Stroke | 47-89983Q1/T1/T2 | Serial Range: 0C159200 THRU 0G589999, 9570790 & Up | |
| Mercury/Mariner | Outboard | 35 | 2-Stroke | 47-89983Q1/T1/T2 | Serial Range: 6445653 THRU 0B110788, 9384476 & Up, 9466647 & Up, B110789 & Up | |
| Mercury/Mariner | Outboard | 40 | 2-Stroke | 47-89983Q1/T1/T2 | Serial Range: 0C159200 & Up, 5556230 & Up, 7144763 & Up, 8064750 & Up, 9251456 & Up, 9570790 & Up | |
| Mercury/Mariner | Outboard | 45 | 2-Stroke | 47-89983Q1/T1/T2 | Serial Range: 0A719281 & Up, 0B110789 & Up, 5531630 THRU 0B110788, 7143688 THRU 0A719280, 8063985 & Up, 9248006 THRU 9466691, 9466692 & Up | |
| Mercury/Mariner | Outboard | 50 | 2-Stroke | 47-89983Q1/T1/T2 | Serial Range: 0A721308 & Up, 0B122930 THRU 0D000749, 5531630 & Up, 6428681 THRU 0B122929, 7143688 & Up, 7208333 THRU 0A721307, 8063985 & Up, 9248006 & Up, 9385911 THRU 9469199, 9469200 THRU 9683054 | |
| Mercury/Mariner | Outboard | 60 | 2-Stroke | 47-89983Q1/T1/T2 | Serial Range: 0A721308 & Up, 0B122930 THRU 0D000749, 6428681 THRU 0B122929, 7208333 THRU 0A721307 90-13288 - 3CYL, 9385911 THRU 9469199 90-13288 - 3CYL Gear Housing, 9469200 THRU 9683054 90-16404 - 3CYL Gear Housing | |
| Mercury/Mariner | Outboard | 70 | 2-Stroke | 47-89983Q1/T1/T2 | Serial Range: 5579017 THRU 6428680, 7145938 THRU 7208332, 8065065 & Up, 9255131 THRU 9385910 90-90647 - 700HP, 3CYL Gear Housing | |
| Mercury/Mariner | Jet | 30 | 2-Stroke | 1994–1997 | 47-89983Q1/T1/T2 | Serial Range: 0C159200-0G58999 |
Technical Specs
- Product Type
- Water Pump Impeller Kit
- Installation
- Vehicle Specific Fit
- Housing Material
- Various materials
- Dimensions
- 3.9 × 3.9 × 1.5 inches (99 × 99 × 38 mm)
- Weight
- 3.5 ounces (0.1 kg)
- Warranty
- Amazon.com Voluntary 30-Day Return Guarantee
- Other Technical Attributes
- Exterior: Machined
What’s in the Box
- 1 x Water Pump Impeller (Replaces 47-89983T1)
- 1 x Set of Gaskets and O-rings
Installation Notes
- Before starting, disconnect the battery and shift the outboard into the neutral position.
- Carefully unbolt and remove the lower unit (gearcase) from the engine's midsection.
- Locate the water pump assembly on top of the gearcase and remove the bolts securing its housing.
- Lift off the housing and remove the old impeller, taking note of the vane orientation. Thoroughly clean any debris from the housing interior and wear plate.
- Lightly lubricate the new impeller with marine grease and install it into the housing, turning the driveshaft clockwise to seat the vanes correctly.
- Install the new gaskets and O-rings provided in the kit.
- Re-install the water pump housing and torque the bolts to the manufacturer's specification.
- Re-attach the lower unit to the midsection and test the engine using a water supply (flushing muffs) to verify strong water flow from the tell-tale outlet.
Troubleshooting & FAQ
How do I confirm this kit fits my engine?
The most reliable method is to match your engine's serial number to the ranges listed in the Engine & Model Compatibility table. While this kit fits many 30-70 HP models, serial number breaks are critical for confirming the correct part.
What are the signs of a failing water pump impeller?
Key indicators include a weak or non-existent water stream from the engine's tell-tale port, frequent engine overheating alarms, and reduced engine performance. An impeller can become brittle, lose fins, or spin on its hub over time.
How often should I replace the impeller?
For preventative maintenance, we recommend inspecting and/or replacing the water pump impeller every 100 operating hours or at least once a year, whichever comes first. This interval should be shorter if you primarily operate in sandy, silty, or saltwater environments.
What is the difference between the Q1, T1, and T2 part numbers?
These suffixes typically represent revisions or variations in kit components from the original manufacturer over time. Our aftermarket kit is designed as a consolidated replacement that interchanges with all listed versions (47-89983Q1, 47-89983T1, and 47-89983T2).
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, it is batch-inspected for consistency and reliability.
Shipping speed & cost
We ship worldwide quickly—typical transit is 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 and specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement part, not an OEM component. Brand names and part numbers are used for reference purposes only.
- Professional installation is recommended for safety and performance. Improper installation can lead to engine damage.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions, typically arriving in 5–15 days.
- Manufacturer-Direct Value — We offer fair pricing by eliminating middlemen, without compromising on materials or quality control.
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