Thanks for the replies! I've weighed the floats with my small electronic scale, and also my reloader scale that weighs in grains. Both say the floats are fine, and they give the same weights although when I do the conversion from grains to grams from the reloader scale, it goes out a few more decimal points... I suppose it is the IVO prop like some of you have mentioned. I had a powerfin prop, but sold it a month or so back. Wish I had it now to see if there was a difference. I'm thinking of trying a two blade warp drive, I have three matching blades and both 2 and 3 blade hubs, but I think a three blade 72 " square tip will be a bit to much prop for an 80 HP. JImChuk