I'm trying to order an oem manual for my johnnyrude. I was told when I bought it the motor is a 1988 150 hp Evinrude. I deciphered the # on the mount and came up with 1982 150 Johnson. I'm wondering if this part was changed out at some point or maybe I was just lied to. I searched the forum and found references to a plug in the block that has a model # on it. Can anyone give me speciffic directions to the location of this plug? fore, aft, port, starboard, up, down? Is there an appreciable difference in those two models? When did they introduce VRO? <br />thanks guys, I'm looking dumber by the minute.