Water Pump Impeller Repair Kit for Mercury Mariner 2-Stroke Outboards 30–70 HP – Replaces 47-89983Q1, 47-89983T1, 47-89983T2
Water Pump Impeller Repair Kit for Mercury Mariner 2-Stroke Outboards 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
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Water Pump Impeller Repair Kit for Mercury Mariner 2-Stroke Outboar...
Water Pump Impeller Repair Kit for Mercury Mariner 2-Stroke Outboards 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 Repair Kit is designed for selected Mercury and Mariner 2-stroke outboard applications from 30 to 70 HP. It is supplied as a water pump service kit without a water pump housing and is intended to replace worn or damaged service components during routine cooling-system maintenance.
The kit is associated with Mercury Mariner references 47-89983Q1, 47-89983T1, and 47-89983T2. Additional aftermarket catalog references include Sierra 18-3007, Sierra/SEI/West Marine 18-3207, and GLM Marine 12250.
- Water pump service kit for selected Mercury and Mariner 2-stroke outboards.
- Supplied without the water pump housing.
- Suitable for applications including 30 Jet, 35 HP, 35 HP 2-cylinder, 40 HP, 40 HP 2-cylinder, 40 HP 4-cylinder, 45 Jet, 50 HP, 50 HP 3-cylinder, 50 HP 4-cylinder, 60 HP 3-cylinder, 65 HP 3-cylinder, and 70 HP 3-cylinder models.
- Aftermarket replacement part; compare the existing pump components and engine identification details before ordering.
Part Number Matrix
Use the references below to compare the service kit with your existing part information. These references are provided for identification and cross-reference purposes.
| Brand or Catalog | Reference Number | Reference Type |
|---|---|---|
| Mercury Mariner | 47-89983Q1 | OEM reference |
| Mercury Mariner | 47-89983T1 | OEM reference |
| Mercury Mariner | 47-89983T2 | OEM reference |
| Sierra | 18-3007 | Aftermarket reference |
| Sierra / SEI / West Marine | 18-3207 | Aftermarket reference |
| GLM Marine | 12250 | Aftermarket service-kit reference |
Engine Compatibility
Company fitment information identifies the following Mercury and Mariner 2-stroke applications. Exact model designation, year, and serial-number coverage can vary within a horsepower family, so confirm the engine label and the original water pump components before installation.
| Brand | Engine or Application | Rated HP | Stroke |
|---|---|---|---|
| Mercury / Mariner | Outboard | 30 | 2-Stroke |
| Mercury / Mariner | Jet | 30 | 2-Stroke |
| Mercury / Mariner | Outboard, including 2-cylinder applications | 35 | 2-Stroke |
| Mercury / Mariner | Outboard, including 2-cylinder and 4-cylinder applications | 40 | 2-Stroke |
| Mercury / Mariner | Jet | 45 | 2-Stroke |
| Mercury / Mariner | Outboard, including 3-cylinder and 4-cylinder applications | 50 | 2-Stroke |
| Mercury / Mariner | Outboard, 3-cylinder | 60 | 2-Stroke |
| Mercury / Mariner | Outboard, 3-cylinder | 65 | 2-Stroke |
| Mercury / Mariner | Outboard, 3-cylinder | 70 | 2-Stroke |
Technical Specifications
- Product Type
- Water pump impeller repair and service kit
- Application
- Selected Mercury and Mariner 2-stroke outboards
- Compatible Power Range
- 30–70 HP, including listed Jet and multi-cylinder applications
- Housing
- Water pump housing not included
- Replacement References
- 47-89983Q1, 47-89983T1, and 47-89983T2
- Product Classification
- Aftermarket replacement
What’s in the Box
This is a water pump service kit supplied without the water pump housing. The precise component quantity and configuration should be confirmed against the product packaging and the water pump arrangement on the engine being serviced.
- Water pump service components for the listed Mercury and Mariner 2-stroke applications
- Water pump impeller and related service parts as configured for this kit
- Water pump housing not included
Installation Notes
- Confirm the engine brand, horsepower, stroke, model designation, and serial number before beginning work.
- Disconnect the battery and follow the safety procedures in the engine service manual.
- Remove the lower unit and water pump components according to the manufacturer's service instructions.
- Inspect the housing, wear surfaces, drive key, driveshaft, and mating surfaces. Replace additional damaged parts as required.
- Install the replacement impeller and service components in the correct orientation, using the service manual for vane direction, sealant requirements, and torque specifications.
- Reassemble the water pump and lower unit, then test the engine in water and verify a steady cooling-water tell-tale stream.
Troubleshooting & FAQ
How do I confirm this kit fits my engine?
Match your engine's brand, horsepower, 2-stroke configuration, model designation, and serial number with the compatibility information. Also compare the existing impeller and pump components with the listed OEM and aftermarket references before ordering.
Does this kit include the water pump housing?
No. This product is a water pump service kit supplied without the water pump housing.
What are common signs of a worn impeller?
Common symptoms include weak or intermittent tell-tale water flow, overheating, and reduced cooling performance. An impeller can also be damaged after running dry or after extended storage.
Should the pump housing be inspected?
Yes. Inspect the housing and wear surfaces whenever the impeller is replaced. A damaged or excessively worn housing may require separate replacement and is not included with this kit.
Is this an OEM part?
No. This listing is for an aftermarket replacement service kit. The Mercury Mariner numbers are OEM reference numbers used for identification and cross-reference.
Safety & Important Information
- Verify the engine model, horsepower, stroke, and serial-number details before purchase.
- Confirm that the water pump housing and other reusable components are in serviceable condition.
- Follow the engine manufacturer's service manual for disassembly, installation, sealant, and torque procedures.
- Professional installation is recommended if you are not experienced with outboard lower-unit service.
About Sea Sierra
- Marine-Focused Parts — We provide replacement components for routine boat and outboard maintenance.
- Clear Fitment Information — Product references and application details help you compare parts before ordering.
- Practical Service Support — We aim to make common marine repair and maintenance jobs easier to plan.
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