that it even matters? It matters to me..... The first year of playing with my new toy, had the original prop 12 3/4" x 21" - OMC thick/heavy aluminum. It had been reworked a time or two, plus it had some recent knicks I was able to file out. 4600r's was it, loaded w/3 or empty. The trim unit wasn't that powerful, but if I set it just right, she would run on that last couple of inches of the hull. I always thought a different prop might get my revs up, but that wasn't the problem.
The linkages on the carb and timing had been tampered with. Which is OK by me in this instance; riding on just the skeg was fun 20 years ago!! During the second year, I was introduced to an unfriendly sand bar!!! Was only turning 1800r's but man! Bent two blades and had to take 0.25" out of all three. Smaller diameter yielded no increase in WOT?? hmmmmm Didn't investigate why, bc it is fast enough as is.
So, "why" go with a 115 now? I wasn't even looking for it, but I have it. That four blade came off of a fuel injected 90hp measured at the prop. The 115 is carbureted and measured at the crank. They oughta match up fairly well - we'll see. Not looking for speed and it has an OK hole shot, but........
I did finally make it to a scale; empty with much less than 6 gals of fuel (15 gallons max), tipped the scale at 1,900 pounds. Add two people and gear etc, plus I always run with a half full 41 gallon livewell. That old V4 is a powerhouse; load her down with camping gear, too - 4,600 rpms, no sweat. I ran it there once to test it, 4,000 is enough. Thanks for letting me rant! :facepalm: