Quicksilver 807252Q5 Replacement Thermostat 160°F for MerCruiser V6 & V8 (1987–2016)

Overview

The Quicksilver 807252Q5 thermostat is a 160°F (71°C) cooling valve designed for V6 and V8 MerCruiser engines from 1987 to 2016 that use standard cooling. This replacement part is engineered to fit within the cooling system as specified in typical owner and service manuals, helping you maintain reliable engine temperatures on the water.

Rather than simply replacing a worn component, this thermostat aims to support predictable coolant flow, helping engines reach and hold their intended operating temperature. While individual results can vary with boat type, load, and operating conditions, a properly matched thermostat can contribute to consistent performance during day trips, weekend cruises, and routine maintenance cycles.

Compatibility and Benefits

• 160°F setpoint helps regulate coolant temperature for steady operation under normal boating loads
• Designed to align with Mercury Marine original equipment manufacturer specifications
• Concrete, real-world fit for MerCruiser V6 and V8 models from 1987 through 2016
• Easy to replace with common shop tools, enabling a quick service window on the workbench or dockside

Installation and Maintenance

• Follow your owner’s manual or service manual for the correct removal and replacement steps
• Ensure the cooling system is properly sealed after installation to prevent leaks
• Use the listed temperature thermostat as part of your routine maintenance to support efficient cooling

Why Choose Quicksilver

Quicksilver has built a reputation for marine precision over more than six decades, delivering parts and accessories that are tested in demanding environments. This thermostat is produced to Mercury Marine OEM specifications, offering a dependable option for maintaining the intended performance of Mercury and Mariner outboards or MerCruiser sterndrives. While not a guarantee of results in every situation, selecting a composition aligned with OEM standards can help you pursue consistent, balanced cooling for your engine.

Note: This item is intended for standard cooling configurations. For engines outside the stated scope or for high-performance variants, please consult official manuals or a qualified marine technician before use.