Maybe I shouldn't ask how I use it because I am aware how to operate it. Just bought another pontoon boat but unlike the ones I have owned in the past, this one has a mercury 4 stroke. With my 2 strokes I either added oil straight to the gas or I used the oil injection system. My question is how does this 4 stroke work? Similar fashion? Sorry for my ignorance. While on the subject are there any additional steps required on a 4 stroke to winterize? Thanks for all the help, I did a few searches and couldn't find exact answers.