just purch. used motor. needing some expertise. motor (honda S/N B752012487 What yr model is this motor. next just drained all the oil in the unit top unit comes with dip stick underneath the cowl. What type oil goes in this area and what is its purpose. do i still have to apply 2 cycle oil to my gas. now the lower unit, what type oil goes in it. I inspected the impeller. I appeared a touch long. should the fins extend against the wall of the inside housing. Was wonder if someone before me used wrong part number. Now parts for unit where can i get parts for this old motor. I checked iboats but cant seem to pull up what i need for checking parts. does it allow you to look at a micro fiche. Anyway alot said hope someone can enlighten me. Thanks