Mercury - Manual-operator - 90-10237081 Yamaha-F25-2002 I’ve swapped plenty of them

I’ve swapped plenty of them on Yamahas where the issue wasn’t obvious until you looked at temperature behavior over time

cutting corners is rarely worth it

but you absolutely rely on when you want the engine to last for years

Yamaha - Thermostat - Engine Cooling System Component - F115 VF115 - 6EK-12411-00-00

Mercury - Manual-operator - 90-10237081 Yamaha-F25-2002 I’ve swapped plenty of themMercury Manual Operator 90 10237081 The Mercury Manual Operator 90 10237081 is an original equipment manufacturer (OEM) guide designed to help Mercury engine owners operate their equipment safely and effectively. This manual delivers clear, precise instructions directly from Mercury, ensuring your engine is run according to factory specifications. Key Features Genuine OEM Manual Authored and approved by Mercury for guaranteed accuracy Detailed