Motor: 2018 Yamaha F90XB Outboard
OCI: 10 hours
OCI length: 1 month
Oil: Yamalube 10W-30
Oil Filter: Yamaha 5GH-13440-70
Make up oil: none
This is my first outboard UOA on my first 4 stroke outboard. After completing the initial 10 hour break in I changed the oil but left the filter. The manual states that the motor is shipped dry. I would assume the boat dealership used Yamalube 10W-30 since they are a Yamaha dealer but who knows. I did replace with Yamalube 10W-30 so it will be interesting to compare UOA's when I change oil again this fall for winter storage. Since the motor is breaking in nothing much to see but it's nice to establish a baseline.
OCI: 10 hours
OCI length: 1 month
Oil: Yamalube 10W-30
Oil Filter: Yamaha 5GH-13440-70
Make up oil: none
This is my first outboard UOA on my first 4 stroke outboard. After completing the initial 10 hour break in I changed the oil but left the filter. The manual states that the motor is shipped dry. I would assume the boat dealership used Yamalube 10W-30 since they are a Yamaha dealer but who knows. I did replace with Yamalube 10W-30 so it will be interesting to compare UOA's when I change oil again this fall for winter storage. Since the motor is breaking in nothing much to see but it's nice to establish a baseline.