Water Pump Impeller for Mercury, Mariner and Force Outboards – Replaces Mercury 47-42038Q02
Water Pump Impeller for Mercury, Mariner and Force Outboards – Replaces Mercury 47-42038Q02 is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller for Mercury, Mariner and Force Outboards – Repl...
Water Pump Impeller for Mercury, Mariner and Force Outboards – Replaces Mercury 47-42038Q02 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump impeller is a high-volume, long-vane replacement for select Mercury, Mariner and Force outboards. The impeller is listed for compatible 2-stroke and 4-stroke applications and is intended for standard gearcase water-pump assemblies. Because fitment depends on horsepower, model, year, gearcase design and serial number, compare your engine identification plate and original impeller before ordering.
The primary manufacturer reference is Mercury 47-42038Q02. Catalog cross-references also identify Mercury 47-42038-1 and 47-42038-2, Sierra 18-3062, GLM 89451, and Mallory 9-45309 and 9-45309-10. These numbers are reference listings; always confirm the complete engine and serial-number conditions.
- High-volume, long-vane impeller design.
- Neoprene rubber impeller with a metal hub.
- Designed for standard gearcase water-pump assemblies.
- Aftermarket replacement; not manufactured by Mercury, Mariner or Force.
Part Number Cross-Reference
The following manufacturer and aftermarket numbers are associated with this impeller design.
| Brand | Reference number | Reference type |
|---|---|---|
| Mercury | 47-42038Q02 | OEM reference |
| Mercury | 47-42038-1 | OEM reference |
| Mercury | 47-42038-2 | OEM reference |
| Sierra | 18-3062 | Aftermarket reference |
| GLM | 89451 | Aftermarket reference |
| Mallory | 9-45309 | Aftermarket reference |
| Mallory | 9-45309-10 | Aftermarket reference |
Engine Compatibility
The impeller is associated with the following Mercury and Mariner applications. Match the horsepower, stroke, model, year and serial number together; a horsepower match alone does not confirm fitment.
| Brand | Model or series | HP | Stroke | Year range | Serial-number or model condition |
|---|---|---|---|---|---|
| Mercury / Mariner | Standard | 6 | 2-Stroke | 1986–2005 | 0A197112 and later |
| Mercury / Mariner | Standard | 8 | 2-Stroke | 1986–2005 | 0P325500 and later; also 0T980000–0T999999 and 1B000001 and later applications |
| Mercury / Mariner | Standard | 9.9 | 2-Stroke | 1986–2005 | 0P325500 and later; also 0T980000–0T999999 and 1B000001 and later applications |
| Mercury / Mariner | Marathon, SeaPro, Viking and Standard | 10 | 2-Stroke | 1986–2005 | Application-specific serial-number ranges; verify before ordering |
| Mercury / Mariner | Marathon, SeaPro, Viking and Standard | 15 | 2-Stroke | 1986–2005 | 0P325500 and later; also 0T980000–0T999999 and 1B000001 and later applications |
| Mercury / Mariner | Standard | 9.9 | 4-Stroke | Through 2004 | 323 cc; listed serial ranges include 0G760300–1B226999 and 0P075166–0P400999 |
| Mercury / Mariner | Standard | 15 | 4-Stroke | Through 2008 | 323 cc; listed serial ranges include 0G760300–1B226999, 0P075166 and later, and 1B227000–1B727495 |
Mercury parts diagrams identify this impeller in gear-housing assemblies for multiple 6 HP and 8 HP engines, including serial ranges beginning at 0A197112, 0D281000, 0G760300, 0P017000, 0P325500, 0T980000 and 1B000001. The exact diagram and impeller reference can vary by gearcase design.
Force Compatibility
Catalog application data identifies this impeller for select 1998 Force applications:
| Brand | HP | Year | Serial number | Application note |
|---|---|---|---|---|
| Force | 9.9 / 15 | 1998 | E288600–E344999 | Mercury lower-unit application; verify the original impeller and gearcase design |
Technical Specifications
- Product type
- Water pump impeller
- Impeller style
- High-volume, long-vane
- Material
- Neoprene rubber with metal hub
- Installation
- Standard gearcase water-pump assembly
- Outside diameter
- Approximately 2.3125 inches (58.8 mm)
- Inside diameter
- Approximately 0.500 inch (12.7 mm)
- Depth
- Approximately 0.469 inch (11.9 mm)
- Vane design
- 6-blade design
- Key
- Not included; inspect the original assembly and order the correct key separately if required
What's in the Box
- 1 × aftermarket neoprene water pump impeller
This listing is for the impeller only. A key, gasket, housing, wear plate and other water-pump components are not included unless specifically stated in the order option. Some catalogs list a separate key-and-washer kit for this impeller family; do not assume those components are included with this impeller.
Installation Notes
- Disconnect the battery and follow the outboard manufacturer's service instructions. Place the engine in a safe, supported position.
- Remove the gearcase and disconnect the shift linkage as required by the specific engine model.
- Remove the water-pump housing and note the direction in which the old impeller vanes are bent.
- Remove the old impeller and clean debris, corrosion and old gasket material from the housing, wear plate and cover.
- Inspect the housing, wear plate, drive key or pin and water tube. Replace damaged parts before installation.
- Lubricate the impeller and pump housing with a lubricant approved for marine water-pump components. Do not use petroleum-based grease unless the manufacturer permits it.
- Install the impeller on the driveshaft, orienting the vanes in the normal direction of rotation.
- Reinstall the housing and gasket as required, tightening fasteners to the engine manufacturer's specified torque.
- Reinstall the gearcase and verify proper alignment of the driveshaft, shift shaft and water tube before operating the engine.
- Run the engine only in an appropriate water supply and confirm a steady cooling-water tell-tale stream. Stop immediately if the engine overheats.
Troubleshooting & FAQ
How do I confirm that this impeller fits my engine?
Match the complete manufacturer, model or series, horsepower, stroke, year and serial number to the application information. Also compare the original impeller's outside diameter, inside diameter, vane style and drive-key arrangement. If any detail differs, confirm the application with a qualified marine technician before ordering.
Does the impeller include a key or gasket?
No. This listing contains one impeller only. Keys, washers, gaskets, housings and wear plates are not included.
What are common signs of a worn water-pump impeller?
Symptoms may include overheating at idle or low speed, a weak or missing tell-tale stream, reduced cooling-water flow, brittle rubber, cracked vanes or missing vane pieces. A damaged impeller should be replaced before further operation.
How often should a water-pump impeller be replaced?
Inspect the impeller at least annually and follow the engine manufacturer's maintenance interval. Replacement may be needed sooner when the outboard is used in saltwater, sandy or silty conditions, or after the engine has been stored for an extended period.
Is this an OEM part?
No. This is an aftermarket replacement impeller cross-referenced to the listed manufacturer and aftermarket numbers. Mercury, Mariner and Force are referenced only to identify compatible applications and part numbers.
Safety & Important Information
- Do not rely on horsepower alone to determine fitment.
- Verify the complete serial-number range, gearcase design, dimensions and drive-key arrangement before installation.
- Never operate an outboard without an adequate cooling-water supply.
- Professional installation is recommended when removing or reinstalling the gearcase.
- Stop operation immediately if the engine overheats or the cooling-water tell-tale flow is abnormal.
About Sea Sierra
- Marine replacement parts — Practical aftermarket components for routine maintenance and repair.
- Application-focused information — Product references are provided together with model, year and serial-number conditions where available.
- Support for fitment checks — Compare your original part and engine identification details before purchase.
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