This might be the first of lotsa Mercury questions....never had one before...... looks like there's a little 90deg. fitting screwed into the front of the lower unit of this motor I recently bought. it's about midway between the power head and gearcase and has a piece of rubber tubing stuck on a barbed nipple. the tubing makes a little loop up and then back down and has a little plastic fitting stuck in the other end. I asked a Merc. mehanic and he said it was a speedometer pick-up-------looks too high on the lower unit to me---wouldn't be in the water when the boat was planing. seems like the fast talkin' guy that sold me the boat said something about a cooling modification----hope this is a good thing. I had surgery recently and haven't run the boat yet....... motor seems to run, cool and shift on the trailer. thanks in advance, HOJO, central Fl.
