tried the search but it never seems to give you the info you need. read a couple of posts but they were for newer outdrives that have a resi bottle in the engine compartment, mine does not. can see what look like a drain screw at the bottom of the outdrive on the side and what appears to be a vent screw, at least thats what it says above the screw. would assume this is where you fill it but really don't know. do these just run 80/90w or do they need something different. if the vent screw is indeed where you fill it do you fill it until it comes out the hole? any help would be greatly appreciated!!!