25 Yamaha 4 stoke oil change
We've got a 25 4 stroke Yamaha (2003) and love it; first season using it. It didn't come with an owner's manual; is changing the oil as simple as pulling the plug (14mm?), draining, new filter, new oil? I've got a Yamaha oil filter and Yamaha oil as well. Any other tricks to this motor? Do I need to change plugs every season like we did with the 2 stroke or any other maintenance issues? We had some oil pooling under the cowling, couldn't find any leaks, maybe the way we had it stored in the connex on the boat (boat trailer tongue elevated way up in the air to get 2 4-wheelers under it somewhat).
I've kept an eye on oil level, no change.