im new to sterndrives but have checked out the winterization section of this board. purchased new '90 boat and had the shop rewinterize it for me until i learn. just got my seloc manual and it says to drain 6 plugs (3 on each side: 1 is manifold, one is block, one is at elbow), plus one petcock on each side, plus lower water hoses. my confusion is that the shop said this engine only had 4 drain plugs in the block (2 on each side). they left them open and i need to close them when i got out the first time. so, im trying to make sure they got it all, and which is right so i can not only close them in spring but do this next season myself. can anyone clarify that has this engine?