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Description
Water Pump Impeller Kit – Fits Mercury Mariner Force 30-70 HP 4-Stroke (Replaces 47-812966A11, 47-812966A12)Water Pump Impeller Kit Fits Mercury Mariner Force 30 70 HP 4 Stroke (Replaces 47 812966A11, 47 812966A12) This water pump impeller repair kit is designed for Mercury, Mariner, and Force 30 70 HP 4 stroke outboard engines (1998present) that have a gearcase torpedo diameter of 3. 44 inches (87. 38mm). Please verify this critical dimension before ordering to ensure correct fitment. It serves as a direct replacement for multiple OEM and aftermarket part
Water Pump Impeller Kit – Fits Mercury Mariner Force 30-70 HP 4-Stroke (Replaces 47-812966A11, 47-812966A12)
This water pump impeller repair kit is designed for Mercury, Mariner, and Force 30-70 HP 4-stroke outboard engines (1998–present) that have a gearcase torpedo diameter of 3.44 inches (87.38mm). Please verify this critical dimension before ordering to ensure correct fitment.
It serves as a direct replacement for multiple OEM and aftermarket part numbers, including Mercury 47-812966A11, 47-812966A12, 46-812966A4, 46-812966A5, 46-812966A6, 46-14334A1, 46-14334A2, 46-14334A3, and Sierra 18-3690.
- Engine Fitment: Mercury/Mariner/Force 30-70 HP 4-Stroke (1998+) with a 3.44" torpedo diameter.
- Durable Construction: Features a high-performance neoprene rubber impeller, stainless steel wear plate and housing, and robust gaskets and O-rings for longevity.
- Complete Kit: Includes all necessary components for a full water pump rebuild, including the impeller, housing, plates, gaskets, seals, and hardware.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury | 47-812966A11, 47-812966A12 |
| Mercury | 46-812966A4, 46-812966A5, 46-812966A6 |
| Mercury | 46-14334A1, 46-14334A2, 46-14334A3 |
| Sierra | 18-3690 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | Driveshaft-Long-2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | Carb 3 CYL [1B227000-1B344306] |
| Mercury | Driveshaft-Long-2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI 3 CYL [1B227000-1B355027] |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI 4 CYL [0T409000-1B355222] |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI 4 CYL [1C000001-1C050251] |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI 4 CYL [1C050252 & Up] |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI Jet 4 CYL [1C051324 & Up] |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI SeaPro 4 CYL [1C453840 & Up] |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 50 | 4-Stroke | 1998–present | 46-812966A12 | EFI 4 CYL [0P153500-0P580772] (Belgium) |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 50 | 4-Stroke | 1998–present | 46-812966A12 | EFI 4 CYL [0T409000-1B355222] |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 50 | 4-Stroke | 1998–present | 46-812966A12 | EFI 4 CYL [1C000001 & Up] |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 60 | 4-Stroke | 1998–present | 46-812966A12 | EFI 4 CYL [0P153500-0P580772] (Belgium) |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 60 | 4-Stroke | 1998–present | 46-812966A12 | EFI 4 CYL [0T409000-1B355222] |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 60 | 4-Stroke | 1998–present | 46-812966A12 | EFI 4 CYL [1C000001-1C453839] |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 60 | 4-Stroke | 1998–present | 46-812966A12 | EFI SeaPro 4 CYL [1C453840 & Up] |
| Mercury | Driveshaft-1.83:1 Gear Ratio | 60 | 4-Stroke | 1998–present | 46-812966A12 | Formula 60 [1C104574-1C782687] |
| Mercury | Gear Housing Driveshaft 2:1 Gear Ratio | 30 | 4-Stroke | 1998–present | 46-812966A12 | [1C456300 & Up] |
| Mercury | Gear Housing Driveshaft 2:1 Gear Ratio | 30 | 4-Stroke | 1998–present | 46-812966A12 | EFI [1C109093-1C456299] |
| Mercury | Gear Housing Driveshaft 2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | [1C018826 & Up] |
| Mercury | Gear Housing Driveshaft 2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI [1C043417-1C456299] |
| Mercury | Gear Housing Driveshaft 2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI [1C049739 & Up] |
| Mercury | Gear Housing Driveshaft 2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI [1C456300 & Up] |
| Mercury | Gear Housing Driveshaft Long 2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | [0P401000 & Up] |
| Mercury | Gear Housing Driveshaft Long 2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | [1B227000-1B344306] |
| Mercury | Gear Housing Driveshaft Long 2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | [1C000001-1C018825] |
| Mercury | Gear Housing Driveshaft Long 2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI [0P401000-0P515896] |
| Mercury | Gear Housing Driveshaft Long 2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI [1B227000-1B355027] |
| Mercury | Gear Housing Driveshaft Long 2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI [1C000001-1C043416] |
| Mercury | Gear Housing Driveshaft Long 2:1 Gear Ratio | 40 | 4-Stroke | 1998–present | 46-812966A12 | EFI [1C000001-1C049738] |
| Mariner | Outboard | 30-70 | 4-Stroke | 1998–present | 46-812966A12 | Same part fits equivalent Mariner models |
| Force | Outboard | 30-70 | 4-Stroke | 1998–present | 46-812966A12 | Same part fits equivalent Force models |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Water Pump Impeller Kit |
| Installation | Direct replacement, fits models with torpedo diameter 3.44" (87.38mm) |
| Housing Material | Neoprene Rubber Impeller and O-rings, Stainless Steel Plate and Housing |
| Housing Color | Black (impeller), Silver (stainless components) |
| Dimensions | Kit components vary; see Package Contents |
| Weight | 0.65 kg (1.43 lbs) |
| Warranty | 30-day refund/replacement |
| Important Fitment Note | This repair kit is easily confused with similar horsepower models. Verify torpedo diameter before ordering. |
Package Contents
- 1 x Impeller (47-19453T)
- 1 x Impeller Key (28-8M0032831)
- 1 x Pump Housing (14334A3)
- 1 x Wear Plate (19700A2)
- 1 x Pump Base (46-812966A7)
- 1 x Lower Wear Plate Gasket (27-19701)
- 1 x Gasket Upper (27-822189)
- 1 x Tube Seal (859770/8597701/893857) - Note: The longer tube seal (893857) is for 4-stroke engines
- 2 x O-Rings (805726)
- 2 x Washer-Plastic (12-858234)
- 3 x Seal (26-830749)
- 4 x Stainless Steel Washers
Installation Guide
- Disconnect the battery and shift the outboard gear into neutral.
- Remove the lower unit (gearcase) by unbolting it from the engine's mid-section.
- Locate and unbolt the water pump housing to access the old impeller.
- Carefully remove the old impeller, key, gaskets, and wear plate. Clean all mating surfaces thoroughly.
- Install the new lower gasket and stainless steel wear plate onto the pump base.
- Insert the new impeller key into the slot on the driveshaft.
- Slide the new impeller onto the driveshaft. Rotate the driveshaft clockwise while pushing down to seat the impeller vanes correctly inside the housing.
- Install the new upper gasket, seals, and O-rings onto the pump housing.
- Secure the pump housing with the bolts, tightening them to the manufacturer-specified torque in a crisscross pattern.
- Reinstall the lower unit, making sure the driveshaft, shift shaft, and water tube are correctly aligned.
- Reconnect the battery. Start the engine in a suitable water source and immediately check for a steady stream of water from the tell-tale outlet.
Troubleshooting & FAQ
Q: How do I confirm this impeller kit fits my Mercury engine?
A: The most critical step is to verify your lower unit's torpedo diameter is 3.44 inches (87.38mm). This kit is often confused with others for similar HP engines. Cross-reference the OEM part numbers listed and check the serial number ranges in our compatibility table to ensure a perfect match.
Q: What are the signs my water pump impeller needs replacement?
A: Common signs that your impeller is failing include a weak or non-existent water stream from the "tell-tale" pisser port, a steadily rising engine temperature gauge at idle or low speeds, or a low water pressure alarm if your engine is equipped with one.
Q: How often should I replace the water pump impeller?
A: For preventative maintenance, it is recommended to inspect and/or replace your water pump impeller every 100-200 operating hours or at least once per season, whichever comes first. This helps prevent overheating and costly engine damage.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy