I have a Four Winns 180 Horizon with the 4.3L OMC and cobra stern drive which I think would be comparable to your stingray. I've played around with weighting it and found I get the best wake with a 600lbs. sack in the ski locker, 150-200lbs lead in the bow and 200-250lbs lead in the rear to move around and even out the wake. I'll throw 50 around b/ front and back, that's where the variance comes from. I've had fat buddies in the rear on each side of the engine but it's too much of a load and the wake isn't really any better. My regular crew is 3 so there are two in the boat while one is riding. My prop is 14.5x19 which works fine. The hole shots are no prob at the weight I use but I have not experimented so a different pitch could work a little better. I use a 'BigAir' 7' stand alone pylon, whale tail on the stern drive and bolt on trim tabs. 21-23mph and 1/4-3/8 up on the trim seems to be the magic combination for a hard, clean, rampy wake. It's no pro setup but it gets me on the water and into the air.
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