Yamaha Outboard Oil Filter 5GH-13440-90-00. Protect your Yamaha four-stroke with the genuine Yamaha outboard oil filter 5GH-13440-90-00. This OEM filter is built to help capture harmful contaminants that circulate through engine oil, supporting clean lubrication, smoother operation, and long-term reliability. Whether you are keeping up with routine service or replacing a worn filter, using the correct Yamaha oil filter helps your outboard stay ready for the next trip.. Supersession note: 5GH-134