Thermostat Kit – Fits Mercury/Mariner 4-Stroke 8-40 HP (Replaces 825212A1, 825212001, 855676003) 15HP while others include only the

while others include only the pump

this is a high-quality aftermarket part designed to meet or exceed OEM specifications

Check your specific model against the list

High-performance or modified engines often require different temperature ratings and specialized components

Reinstall the upper fill plug screw with its new gasket first

Thermostat Kit – Fits Mercury/Mariner 4-Stroke 8-40 HP (Replaces 825212A1, 825212001, 855676003) 15HP while others include only theProduct Details This Thermostat Kit Fits Mercury Mariner 4 Stroke 8 40 HP Outboard Motors is an essential component for maintaining optimal engine temperature in Mercury Mariner 4 Stroke 840 HP outboard engines from 19952018, including specific 30 HP (19992005), 40 HP (19982018), and 50 HP (19952000) models. It serves as a direct cross reference for multiple OEM and aftermarket part numbers, including Mercury 825212A1, 825212001, 855676003, 825212T02,