i have a 120 omc with a stinger out drive and am back with more question after getting my boat started thanks to this webb site. now it has a new problem it was pissing water out the back like it should while it water tryed froward and rev. nice and smooth than it stopped pissing water started to over heat so am thinking water pump.i need to know how hard this is? am pretty good with tools and car motors but have never done tihs as this is my frost boat. can i get at this from top or or drop the bottom end any help i would be thankful after reading the blogs got to say am on the potty about this problem !!!!