Water Pump Impeller – Fits Mercury/Mariner 6–15 HP, Chrysler Force and Sears 9.9–15 HP

Product Details

This aftermarket water pump impeller is a direct replacement for selected Mercury and Mariner outboard water-pump applications, as well as specific Chrysler, Force and Sears applications. The listed fitment includes Mercury/Mariner 2-Stroke 6–15 HP engines, selected Mercury/Mariner 4-Stroke 8–15 HP engines, and selected Force, Chrysler and Sears 9.9–15 HP models. Always verify the engine model, year, serial number, stroke and original impeller number before ordering.

The impeller is listed as a replacement for Mercury references 47-42038-2 and 47-42038Q02. Additional aftermarket reference numbers are included below as cross-reference leads; number matching alone does not replace confirmation of the complete engine fitment conditions.

• Direct-replacement water pump impeller for specified applications
• Neoprene rubber construction with a bonded center insert
• Designed to support consistent water circulation for outboard cooling
• Single impeller supplied; no additional gasket, key or water-pump housing is included unless separately stated

Part Number Matrix

Use this matrix to compare the listed OEM and aftermarket reference numbers with the number on your original part. Confirm the complete engine application before purchase.

Mercury, Mariner, Chrysler, Force, Sears, Sierra, Mallory and GLM are manufacturer or brand names used only to identify reference applications and part-number cross-references. This is an aftermarket replacement and is not manufactured by Mercury Marine.

Engine & Model Compatibility

Confirm the engine brand, model, horsepower, stroke, production year and serial-number range against your engine documentation before installation. The tables below describe the listed applications and should not be used to infer fitment for an unspecified model or serial range.

Mercury/Mariner 2-Stroke: Listed applications cover selected 6–15 HP models from the years shown below, including Standard, Marathon, SeaPro, Viking and XR10 variants.

Mercury/Mariner 4-Stroke: Listed applications cover selected non-Bigfoot 8–15 HP engines in the years and serial ranges shown. Match the serial number and displacement before ordering.

Force/Chrysler/Sears outboards: Listed applications cover selected 1998 9.9 HP and 15 HP 2-Stroke models.

Technical Specs

Product Type

Water pump impeller

Product Format

Single replacement impeller, not a kit

Installation

Direct replacement for specified applications

Material

Neoprene rubber with bonded center insert

Dimensions

Diameter: 58.8 mm (2.315 in); depth: 11.9 mm (0.469 in); shaft diameter: 12.6 mm (0.496 in)

Center Insert

Bonded to the impeller vanes to help resist tearing and maintain water flow

What’s in the Box

• 1 × Water pump impeller

The package does not include a separate key, gasket, housing, cover or complete water-pump repair kit unless those items are specifically listed with the order.

Installation Notes

1. Disconnect the spark-plug wires, remove the ignition key where applicable and secure the propeller.
2. Place a drain pan under the lower unit and follow the engine manufacturer’s procedure for draining the gearcase oil.
3. Remove the fasteners securing the lower unit to the driveshaft housing, then carefully separate the gearcase.
4. Remove the water-pump housing cover to expose the old impeller.
5. Remove the old impeller and note the vane orientation. Clean debris from the housing and water passages.
6. Inspect the housing, wear plate, key and seals. Replace worn or damaged components as required; these parts are not included with this listing.
7. Lubricate the impeller and housing with a suitable lubricant recommended by the engine manufacturer. Do not use a lubricant that can damage neoprene.
8. Install the impeller with the key correctly positioned and orient the vanes in the direction specified for the engine.
9. Reinstall the water-pump housing and tighten its fasteners to the manufacturer’s specifications.
10. Guide the driveshaft and shift linkage back into position, then reinstall and secure the lower unit.
11. Refill the gearcase with the correct marine gear oil according to the engine manufacturer’s procedure.
12. Run the engine only in an appropriate water supply or test tank and verify a strong cooling-water telltale stream before normal operation.

Use the service manual for the specific engine when removing the lower unit, setting vane orientation, routing the shift linkage and tightening fasteners.

Troubleshooting & FAQ

Safety & Important Information

• Verify the complete engine application, including model, year, horsepower, stroke and serial number, before purchase.
• Compare the original impeller’s dimensions and reference number where possible.
• This is an aftermarket replacement, not an OEM component.
• Do not run an outboard without an adequate water supply. Stop immediately if the engine overheats or the telltale stream is absent.
• Professional installation is recommended when lower-unit removal or shift-linkage adjustment is unfamiliar.

About Sea Sierra

• Marine Replacement Parts — Replacement components for selected outboard maintenance applications.
• Application-Focused Listings — Use the listed engine conditions and reference numbers to help verify the correct part.
• Customer Support — Provide your engine model, serial number, horsepower, stroke and original part number when requesting fitment assistance.