SKU: 12544280982

Water Pump Impeller Repair Kit – Fits Mercury/Mariner 30-70 HP (Replaces 46-77177A3, 77177A3)

Sale price$26.95 Regular price$29.95
Save 10%

Pay in installments of $7.49 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 17 - Aug 22

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Water Pump Impeller Repair Kit – Fits Mercury/Mariner 30-70 HP (Replaces 46-77177A3, 77177A3)Water Pump Impeller Repair Kit Fits Mercury Mariner 30 70 HP This water pump impeller repair kit is designed for Mercury Mariner 2 Stroke outboard engines from 30 to 70 HP, model years 19761997. It provides a comprehensive solution for restoring your engine's cooling system performance. This kit serves as a direct replacement for Mercury OEM part numbers 46 77177A3 and 77177A3, as well as aftermarket parts from Sierra, GLM, Mallory, EMP, and Recmar.

Water Pump Impeller Repair Kit – Fits Mercury/Mariner 30-70 HP

This water pump impeller repair kit is designed for Mercury/Mariner 2-Stroke outboard engines from 30 to 70 HP, model years 1976–1997. It provides a comprehensive solution for restoring your engine's cooling system performance.

This kit serves as a direct replacement for Mercury OEM part numbers 46-77177A3 and 77177A3, as well as aftermarket parts from Sierra, GLM, Mallory, EMP, and Recmar.

  • Includes a complete set of components for a full service: new housing, impeller, gaskets, seals, and hardware.
  • Features a durable Nylon PA66 plastic housing and a neoprene rubber impeller for reliable performance.
  • Installs in the lower unit (gearcase) of the outboard.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Mercury (OEM) 46-77177A3 / 77177A3
Sierra 18-3324
GLM 12100
Mallory 9-48312
EMP 46-01115
Recmar REC46-77177A3

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 JET (3CYL) 30 2-Stroke 1989-1997 46-77177A3 Serial Range: 0C159200-0G589999, 9570790 & Up
Mercury/Mariner Various 35 2-Stroke 1984-1989 46-77177A3 2 cylinders, Serial Range: 6445653 & Up, 209608 & Up
Mercury/Mariner Various 40 2-Stroke 1978-1983 46-77177A3 2 cylinders, Serial Range: 5556230 & Up
Mercury Various 40 2-Stroke 1989 & Up 46-77177A3 4 cylinders, Serial Range: 0C159200 & Up, 9570790 & Up
Mercury Various 45 2-Stroke 1986 & Up 46-77177A3 4 cylinders, Serial Range: 5531630 & Up
Mercury Various 50 2-Stroke 1978-1985 46-77177A3 4 cylinders, Serial Range: 4962056 & Up
Mercury Various 50 2-Stroke 1984-1990 46-77177A3 3 cylinders, Serial Range: 6428681-0D000749, 0A721308 & Up
Mercury Various 60 2-Stroke 1984-1990 46-77177A3 3 cylinders, Serial Range: 6428681-0D000749, 0A721308 & Up
Mercury Various 65 2-Stroke 1976 46-77177A3 3 cylinders, Serial Range: 4382057-4571651
Mercury Various 70 2-Stroke 1977-1983 46-77177A3 3 cylinders, Serial Range: 4977157-0B110053, 5579017-6428680

Technical Specifications

Specification Value
Product Type Water Pump Impeller Repair Kit with Housing
Installation Lower Unit/Gearcase
Housing Material Nylon PA66 Plastic
Impeller material Neoprene Rubber
Housing Color Black
Package Dimensions 156 × 102 × 53 mm (6.14 × 4.02 × 2.09 inches)
Package Weight 0.22 kg (7.8 oz)
Fitting Type Vehicle Specific Fit
Warranty Lifetime (from some aftermarket suppliers)

Package Contents

  • 1 x Water Pump Housing (77822A1)
  • 1 x Insert (48753)
  • 1 x Impeller (89983T)
  • 1 x Upper Water Pump Gasket (19551)
  • 1 x Lower Water Pump Gasket (19553)
  • 1 x Face Plate (32768)
  • 2 x Gasket (19552)
  • 1 x O-Ring (25-26722)
  • 2 x Drain Plug Seal (26-830749)
  • 2 x O-Ring (805726)
  • 1 x Key (8M0032837)
  • 1 x Rubber Seal (25-20273)
  • 1 x Shift Bracket Seal (37721001)

Installation Guide

  1. Disconnect Power: Disconnect the battery and spark plug wires for safety.
  2. Shift to Neutral: Place the outboard in the neutral gear position.
  3. Remove Lower Unit: Unbolt and carefully lower the gearcase (lower unit) from the outboard's driveshaft housing. You may need to disconnect the speedometer tube.
  4. Access Water Pump: With the lower unit removed, locate and unbolt the water pump housing.
  5. Remove Old Components: Remove the pump housing, impeller, wear plate, and old gaskets. Note the orientation of the impeller fins.
  6. Clean Surfaces: Thoroughly clean all mating surfaces, removing any old gasket material or corrosion.
  7. Install New Gaskets & Plate: Place the new lower gasket and face plate onto the gearcase.
  8. Install Impeller: Lightly lubricate the new impeller and housing interior. Slide the new key onto the driveshaft and install the impeller, twisting it clockwise to bend the fins correctly.
  9. Install New Housing: Place the upper gasket and new housing over the impeller and bolt it down securely.
  10. Reinstall Lower Unit: Guide the driveshaft back into the engine, ensuring the water tube and shift shaft align. Bolt the lower unit back into place.
  11. Test Operation: Reconnect the battery and spark plugs. Start the engine in water and immediately check for a steady stream of water from the tell-tale outlet.

Troubleshooting & FAQ

How do I confirm this kit fits my engine?
Verify your engine's model, horsepower, and year against our compatibility table. Most importantly, check your engine's serial number to ensure it falls within the specified ranges listed in the 'Notes' column.

What are the signs of a failing water pump impeller?
Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "tell-tale" outlet, and in some cases, a high-temperature alarm from your console.

How often should I replace the water pump impeller?
As a general maintenance guideline, it is recommended to inspect and/or replace the impeller every 1 to 2 years, or every 100-200 hours of use. This can vary depending on your operating conditions (e.g., saltwater vs. freshwater, sandy/silty water).

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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:
  1. 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
SKU: 12544280982

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.9 ★★★★★
Based on 10 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
J
Jon V
West Palm Beach, US
★★★★★ 4
Super helfpul in the summer
Pros: Charging functionality supports fast wireless output. Mount design integrates cleanly with dashboard appearance. Cooling fan improves charging durability. Works well with MagSafe alignment. RGB lighting enhances visual look. Strong suction Easy to adjust to fit and manoeuvre Cons: Noise level from fan audible. Installation alignment requires precision. Lighting brightness distracting at night. Value for money higher than basic mounts.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
J
Jennifer Renee Shipman
New York, US
★★★★★ 5
Coolest wireless charger design I've seen
I just gotta say that this is the coolest design for a wireless charger, looks kinda futuristic. Now how well does this work? Amazingly well and truly easy to use. It is adjustable, stable and much safer for everyone. I really like this charger.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 6, 2026
G
Gus A.
Bozeman, US
★★★★★ 3
Wow that light color ring is annoying
There is no way to turn this color light off. I don't even know why it has to have a light at all. I suppose it is to tell you it has power. But the light could have been something that momentarily turns on and then off as you place the phone on. I'm a DIY'er and I'm going to find a way to take this apart and disable the light. I'll report back if I'm successful. The good news is that this mount is identical to another one I have except for the magnet charging section. I'm talking it is identical down to the knobs and metal arm so it's generic in that sense. They only changed out the magnetic section. This type of mount holds well to the screen. The charging speed seemed adequate. Not terribly fast but not slow. Wirelessly charging is always slower than plugged in. The supplied USB cable is braided and feels like quality. See attached picture. This mount is not something you'll necessarily want to use every time you drive. Therefore the color ring is annoying.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2026
C
Check this out America!
Natrona Heights, US
★★★★★ 5
SLEEK EXTENDABLE SCREEN MOUNT
HIGH SPEED TESLA MAGSAFE POWER i picked this up for my Model 3 to see if the 25W Qi2.2 charging actually lives up to the hype during my daily work week. ✨ The CNC aluminum build is top notch and feels much more robust than the flimsy plastic mounts i have tested. It's a piece of cake to clamp onto the corner of the Tesla screen and the metal arm matches the interior aesthetics perfectly. The magnetic hold is strong enough to keep my phone secure even when i am taking sharp turns thru my weekend adventures. ✨ Performance is where this thing shines because it actually delivers the 25W speeds without overheating. The built in cooling fan is a smart design choice that keeps the temperature down during long drives. i can hear the fan if the music is off but it's barely noticeable and definitely worth it for the consistent charging speed. ✨ The RGB lighting adds a subtle glow that makes it easy to find the mount in the dark without being distracting. Having the extendable arm is a big benefit for finding the perfect line of sight without blocking the main touchscreen. It's clearly a well thought out solution for any Tesla owner who wants a professional grade charging setup. THE VERDICT This is a exceptional piece of hardware that delivers real world results for high speed charging. The combination of active cooling and a sturdy metal build makes it a first class addition to my car. 'As a 35 year veteran of the computer technology industry, I offer informed and experienced perspectives in my product reviews.' I will update this review if anything changes within 1 year. ★★★★★ (5 Stars): A 5 star rating indicates the product meets my expectations for its purpose.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 13, 2026
B
Verified Purchase
Brett C Stutz
Grantham, US
★★★★★ 5
Works great. Perfect position
Grip and charging are great. I like the position because it doesn't block my view or the vents
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 31, 2026

recommand products