Changing Oil on a Yamaha 225 hp

What’s great about the Yamaha 225 hp four-stroke is that you only have to change the oil in the gear case. The oil injection system mixes the oil and gasoline precisely, so you don’t have to worry about getting the right ratio. The only drawback to the 225 hp is that you have to tilt the motor to drain the oil from the front rather than the bottom like most motors. Still, the process is not too difficult so long as you know what you’re doing and have Yamaha outboard oil on hand.

Start by tilting the motor up so the oil drain plug is the lowest point. Place a drain pan under the drain plug. Next, you will need to remove the nut and bolt holding the cooling water inlet covers, the magnetized drain plug, and the oil level plug. Let the oil drain out and then tilt the motor down and replace the oil. Place all of the covers and parts back on and you’ll be good to go!