Hi guys, first post but I've been lurking for a few month. I just bought a 1990 Sunbird with a 1993 Mercury 200 outboard ( I think). We took it out on the lake to test and seems ok but I noticed some stuff I didn't like so wanted to get some advice from you guys. First of all motor started fine but no flow of water was exiting at all through the exit hole? I unscrewed the bottom oil screw and hardly anything came out, but oil did seem to look clean whatever was in there. Last I'm trying to open the cover to check everything inside, but can't for the life of me figure how to do it. I am attaching some pictures for reference, following the number I think it is a1993, but don't quote me on that.