1974 model # 50473m 50 hp Evinrude.... I have new T stat and pressure relief valve parts to install..... My question is the relief valve.... It has a short side and a long side... Which side does the spring go on ?? The factory book doesn't tell me... The parts picture isn't clear either... The old one was melted and distorted so bad it's impossible to tell which side the spring was on... Thanks....