I just bought a new prop for my '86 115 merc. Had a 19 pitch aluminum prop on it. I bought 13 pitch to pull out water skiers but the diameter is 14" and hits the trim tab anode. According to (cringe) Overton's where I bought it, it should fit. Are they wrong, are there different size tabs or am I going to just have to get a different prop? (background- couldn't pull out a water skier on combos with the 19 pitch!)