Compatible OEM part numbers: 67F-12411-01, 6CB-12411-01, 67F-12411 — direct replacement for the listed parts. Application: Designed for 4-stroke outboard motors rated 75–250 HP. Primary function: Regulates engine temperature by housing a reliable thermostat to prevent overheating and maintain correct operating temperature. Construction: Corrosion-resistant metal housing that resists saltwater and marine environments for extended service life. Key benefit: Restores proper cooling control so the engine runs efficiently, reduces thermal-related wear, and helps prevent breakdowns caused by thermostat failure. Fit and performance: Built to match original equipment form and function for straightforward replacement and consistent temperature regulation under normal operating conditions. Typical use scenarios Routine maintenance: Replace worn or age-hardened thermostat assemblies during scheduled service to maintain reliable cooling performance on 75–250 HP 4-stroke outboards. Overheating repair: Swap in this unit when symptoms such as slow warm-up, fluctuating temperature, or overheating indicate a failed thermostat or housing leak. Pre-trip reliability check: Install before long cruises or heavy-load conditions to reduce the risk of temperature-related engine problems. What to expect Reliable temperature control matching OEM intent for the listed part numbers. Durable metal housing designed to withstand marine exposure. Straightforward compatibility with 75–250 HP 4-stroke outboard engines specified by the OEM numbers above. Note: Confirm fit by comparing your existing part number to 67F-12411-01, 6CB-12411-01, or 67F-12411 before purchase.