Hi to everyone, I'm new here. I'm repowering my 19' cruiser w/ a 1982 115 Merc TOP that I just bought. Seems to have been gently used and v. well cared for. One thing I notice though is on the carburetors(3) there seems to be an air jet removed from the middle and top carb but not the bottom one. I asked a friend who works on motors and he said "they used to do that(remove them) back in the day to save the motor". So I asked why only 2 and not the 3rd, he didn't know. Any ideas? Sorry, no pics, I'll get some tomorrow, but they're right on the face of the carb, any old heads out there remember any of these old performance tricks?