Thermostat 54C for Mercury Mariner 200HP-300HP Optimax (Replaces 8M0057307)

Includes: - Thermostat 54C

Fits Models: - Mercury Mariner

Model Years: - Check fitment before purchase

Submodels: - Common trims include 200HP, 225HP, 250HP, 300HP; chassis codes may vary by year; body style is typically outboard motor

Engine Options: - 2.5L V6, 3.0L V6; engine codes may include 2.5L Optimax

Description: This thermostat is designed for Mercury Mariner outboard motors ranging from 200HP to 300HP, specifically for the Optimax series. It ensures optimal engine temperature regulation, enhancing performance and efficiency. The part replaces Mercury part number 8M0057307, providing a reliable solution for maintaining your outboard motor's cooling system.

Features: - Direct replacement for 8M0057307 - Ensures optimal engine temperature - Compatible with Mercury Mariner 200HP-300HP Optimax models - Durable construction for long-lasting performance - Bolt-on installation

Part Number: 8M0057307