Water Pump Repair Kit for Mercury Mariner 25 50 HP Outboard 821354A04 18 4531

This Water Pump Repair Kit is a water pump repair kit compatible with Mercury Mariner 25-50 HP Outboard motors and matches OEM Part# 821354A04 and 18-4531.

Product Overview

This Water Pump Repair Kit provides essential components to replace the water pump on Mercury and Mariner outboard motors from 25 to 50 HP. Designed to restore cooling system performance, this kit helps prevent overheating and engine damage. The water pump repair kit includes gaskets and seals for a complete overhaul.

Key Features & Performance

• Includes all necessary gaskets and seals for water pump replacement
• Direct fit for Mercury/Mariner 25-50 HP outboards
• Replaces OEM part numbers 821354A04 and 18-4531
• Helps maintain proper engine cooling and prevent overheating
• High-quality materials for reliable performance

Fitment & Compatibility

• Mercury Outboard 25-50 HP
• Mariner Outboard 25-50 HP
• Replaces OEM Part #821354A04, 18-4531

Common Uses

• Replacing worn or failed water pump in outboard motors
• Performing routine maintenance on Mercury/Mariner engines
• Restoring cooling efficiency for extended engine life
• Preventing overheating during operation

Technical Specifications

• Part Number(s): 821354A04, 18-4531
• Engine Compatibility: Mercury/Mariner 25-50 HP

Frequently Asked Questions

Q: Is this kit compatible with a 2000 Mercury 40 HP? A: Yes, this water pump repair kit fits Mercury and Mariner outboards from 25 to 50 HP, including the 40 HP model.

Q: Does the kit include the impeller? A: Yes, the water pump repair kit typically includes an impeller, gaskets, and seals for a complete rebuild. Check the product listing for exact contents.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.