When I picked up my 60HP yamaha the oil in the engine was up to the top mark on the dip stick. It stayed that way for 21 hours of running time. I had the 20 hour check-up today and when I got home I checked the oil. They only filled the engine to half way between the two marks on the dip stick. I called the mechanic and he said that yamaha only wanted the oil to be half to two thirds on the marks, and NOT at the top mark. My first question was why was it that way when I got it? No real answer. The owners manual says to fill the oil so that is between the marks with no reference to where. So technically the current level would be acceptable according to the manual, but in my thinking it would be better to have the most oil allowed and have it up to the top mark. However, has anyone ever heard of this before? Where on the dip stick is your oil level?