Water Pump Impeller Kit for Mercury/Mariner 30–70 HP 2-Stroke Outboards – Replaces 47-89983Q1, 47-89983T1 and 47-89983T2
Water Pump Impeller Kit for Mercury/Mariner 30–70 HP 2-Stroke Outboards – Replaces 47-89983Q1, 47-89983T1 and 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 for Mercury/Mariner 30–70 HP 2-Stroke Outbo...
Water Pump Impeller Kit for Mercury/Mariner 30–70 HP 2-Stroke Outboards – Replaces 47-89983Q1, 47-89983T1 and 47-89983T2 is backordered and will ship as soon as it is back in stock.
Product Details
This water pump impeller kit is intended as a replacement service kit for selected Mercury and Mariner 2-stroke outboards and jet-drive applications rated from 30 HP through 70 HP. It is designed to help restore water-pump performance and maintain proper engine cooling when the existing impeller is worn, damaged or no longer moving sufficient water.
The kit is listed as an interchange for Mercury references 47-89983Q1, 47-89983T1 and 47-89983T2, and for aftermarket reference Sierra 18-3207. Always verify the engine model and complete serial-number range before ordering.
- Replacement water-pump impeller service kit for selected Mercury and Mariner applications.
- Includes gaskets and O-rings for servicing the water-pump assembly.
- Machined exterior finish on the impeller component for proper installation in the pump assembly.
Part Number Matrix
Use the following references to compare the part removed from your engine with the replacement kit. Part-number references do not replace verification of the engine model and serial number.
| Brand | Part Number | Notes |
|---|---|---|
| Mercury | 47-89983Q1 | Original-equipment reference. |
| Mercury | 47-89983T1 | Reference associated with this replacement application. |
| Mercury | 47-89983T2 | Reference associated with this replacement application. |
| Sierra | 18-3207 | Aftermarket cross-reference. |
Engine & Model Compatibility
The compatibility information below covers the applications listed for this replacement. Serial-number breaks are important, so confirm the complete serial number on your engine before installation.
| Brand | Application | Rated HP | Stroke | Years | OEM Reference | Serial or Application Notes |
|---|---|---|---|---|---|---|
| Mercury/Mariner | Outboard | 30 | 2-Stroke | 47-89983Q1/T1/T2 | Serial range: 0C159200 through 0G589999; 9570790 and up. | |
| Mercury/Mariner | Outboard | 35 | 2-Stroke | 47-89983Q1/T1/T2 | Serial ranges: 6445653 through 0B110788; 9384476 and up; 9466647 and up; B110789 and up. | |
| Mercury/Mariner | Outboard | 40 | 2-Stroke | 47-89983Q1/T1/T2 | Serial ranges: 0C159200 and up; 5556230 and up; 7144763 and up; 8064750 and up; 9251456 and up; 9570790 and up. | |
| Mercury/Mariner | Outboard | 45 | 2-Stroke | 47-89983Q1/T1/T2 | Serial ranges: 0A719281 and up; 0B110789 and up; 5531630 through 0B110788; 7143688 through 0A719280; 8063985 and up; 9248006 through 9466691; 9466692 and up. | |
| Mercury/Mariner | Outboard | 50 | 2-Stroke | 47-89983Q1/T1/T2 | Serial ranges: 0A721308 and up; 0B122930 through 0D000749; 5531630 and up; 6428681 through 0B122929; 7143688 and up; 7208333 through 0A721307; 8063985 and up; 9248006 and up; 9385911 through 9469199; 9469200 through 9683054. | |
| Mercury/Mariner | Outboard | 60 | 2-Stroke | 47-89983Q1/T1/T2 | Serial ranges: 0A721308 and up; 0B122930 through 0D000749; 6428681 through 0B122929; 7208333 through 0A721307; 9385911 through 9469199, 90-13288, 3-cylinder gear housing; 9469200 through 9683054, 90-16404, 3-cylinder gear housing. | |
| Mercury/Mariner | Outboard | 70 | 2-Stroke | 47-89983Q1/T1/T2 | Serial ranges: 5579017 through 6428680; 7145938 through 7208332; 8065065 and up; 9255131 through 9385910, 90-90647, 3-cylinder gear housing. | |
| Mercury/Mariner | Jet | 30 | 2-Stroke | 1994–1997 | 47-89983Q1/T1/T2 | Serial range: 0C159200 through 0G58999. |
Technical Specifications
- Product Type
- Water pump impeller kit
- Application
- Selected Mercury and Mariner 2-stroke outboards and jet-drive applications
- Rated Applications
- 30–70 HP, subject to model and serial-number verification
- Installation
- Vehicle-specific fit; verify application before purchase
- Housing Material
- Not specified for the complete kit
- Dimensions
- 3.9 × 3.9 × 1.5 inches (99 × 99 × 38 mm)
- Weight
- 3.5 ounces (0.1 kg)
- Finish
- Machined exterior on the listed component
What's in the Box
- 1 × Water pump impeller
- 1 × Set of gaskets and O-rings
The impeller is supplied as part of the service kit and is intended to replace the listed 47-89983Q1, 47-89983T1 or 47-89983T2 application. Confirm the contents against the product received before beginning installation.
Installation Notes
- Before servicing the engine, disconnect the battery and place the outboard in neutral.
- Remove the lower unit or gearcase according to the applicable service procedure.
- Locate the water-pump assembly on top of the gearcase and remove the fasteners securing the pump housing.
- Remove the housing and old impeller. Note the vane orientation, then clean debris from the housing and wear-plate area.
- Lightly lubricate the new impeller with a suitable lubricant and install it in the housing while turning the driveshaft clockwise to seat the vanes.
- Install the supplied gaskets and O-rings in their correct locations.
- Reinstall the water-pump housing and tighten the fasteners to the engine manufacturer's specification.
- Reinstall the lower unit and test the engine with an appropriate water supply. Confirm water flow from the tell-tale outlet before normal operation.
Follow the service manual for your exact engine when removing the lower unit, selecting lubricants and applying torque values. If the engine model or serial number is outside the ranges shown above, do not assume compatibility.
Troubleshooting & FAQ
How do I confirm that this kit fits my engine?
Match the engine brand, model, horsepower, 2-stroke configuration and complete serial number with the compatibility information above. A matching part number alone is not sufficient when serial-number breaks apply.
What are the signs of a failing water-pump impeller?
Common signs include weak or absent water flow from the tell-tale outlet, overheating warnings, elevated operating temperature and reduced cooling performance. An impeller may become brittle, lose vanes or slip on its hub as it wears.
How often should the impeller be inspected or replaced?
Inspect and replace the impeller according to the maintenance schedule for your exact engine. Service may be needed more frequently when operating in sandy, silty or saltwater conditions.
What is the difference between the Q1, T1 and T2 references?
These are different Mercury reference numbers associated with the listed application. Verify the engine model and serial number rather than relying only on the suffix when selecting a replacement.
Is this an OEM component?
This listing is for an aftermarket replacement kit, not a Mercury-branded OEM package. Mercury, Mariner and the listed part numbers are used to identify the intended application and reference parts.
What are the shipping and return terms?
Shipping options, delivery estimates and return eligibility are determined by the store and are shown during checkout or in the applicable store policy.
Safety & Important Information
- Verify the engine model, horsepower, stroke, serial number and original part before ordering.
- Do not operate the engine without an adequate water supply after installation.
- Use the service manual for the exact engine when removing the lower unit and tightening fasteners.
- Improper installation can cause inadequate cooling and serious engine damage. Professional installation is recommended when the correct procedure or fitment is uncertain.
- This is an aftermarket replacement part. Brand names and manufacturer part numbers are included only for application and cross-reference purposes.
About Sea Sierra
- Marine Replacement Parts — Replacement components for maintenance and repair of marine engines and equipment.
- Application-Focused Information — Product references and fitment details are provided to help customers compare the replacement with the original part.
- Support for Correct Selection — Verify model and serial-number details before ordering and consult the applicable service information for installation.
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