Yamaha OX66 150hp Maintenance

[mabingman]

Just bought a boat from an older gentleman that has an ox66 150 on it. The digital gauge on the dash shows only 64 hour, I have tried to reset it but can't so I am guessing that it original hours. That being said I am not sure what maintenance been done on this motor besides lower unit oil changed and new impeller recently. What are some of the general maintenance items i need to take care of? o2 sensors, filters?

[redheadmx]

https://www.youtube.com/playlist?lis...-s-ShaQzITKUvv

dont forget trailer maint either, lubing and checking tires.