Mercury Water Pump Repair Kit (77177A3)

The Mercury Water Pump Repair Kit (77177A3) is a genuine OEM solution for restoring the cooling performance of older Mercury and Mariner outboard engines. Designed for small horsepower models, this kit includes all the critical components needed to service your water pump, ensuring your engine maintains proper cooling and protection.

Water pumps play a vital role in regulating engine temperature. Over time, impellers and gaskets wear down due to exposure to water, heat, and debris. A worn water pump can lead to reduced water flow, overheating, and eventual engine damage. The repair kit  is the reliable answer to prevent these issues before they become costly problems.

Included in the kit:

• OEM impeller

• Stainless steel wear plate

• Upper and lower gaskets

• Water tube seal

• Key and O-rings

The Mercury Water Pump Repair Kit (77177A3) is built to the exact specifications required for a range of early-model outboards, particularly in the 4.5HP to 9.8HP range. All components are manufactured using corrosion-resistant materials to withstand both fresh and saltwater environments.

This kit is ideal for seasonal maintenance or as a replacement after an impeller failure. It provides everything you need in one convenient package—no need to source individual parts. Installation restores water flow through the cooling system and ensures your engine remains in top condition.

As a genuine Mercury Marine product, the Mercury Water Pump Repair Kit (77177A3) offers superior fit, durability, and peace of mind. It’s trusted by boaters and marine professionals alike for dependable performance on the water.

Key Benefits:

• OEM quality replacement parts

• Restores cooling efficiency

• Prevents overheating and costly damage

• Designed for select Mercury/Mariner small outboards

• Complete kit for convenience and reliability

Compatibility:
Fits select Mercury/Mariner 4.5HP, 7.5HP, and 9.8HP 2-stroke outboards (check your model and serial number to confirm fitment).

Follow us on Facebook, Instagram and Youtube.

Terms & Conditions | Returns & Exchanges | Privacy Policy