What is involved with a 25 hp mercury outboard motor tune up?

A tune-up for a 25 hp Mercury outboard motor typically involves several key steps: replacing the spark plugs, changing the lower unit oil, inspecting and cleaning the fuel filter, and checking the propeller for damage. It's also important to examine the cooling system, including the water pump and thermostats, to ensure proper water flow. Additionally, the carburetor may need adjustment or cleaning, and the motor should be tested for any software updates if it's a newer model. Regular maintenance helps ensure optimal performance and longevity of the motor.