Quote:
Originally Posted by Makover
Looking to swap 3 for 4 blade ,what pitch for a 23 without t-top and runs light all the time . Need to know if it should be a 14 x 18p or 14 3/4 x 19p may go alum to start to get dialed in,so I get the best performance and top end. Looking for near 50 mph if possible. This is a 250 EFI Merc ,may cup 18 if needed later.Feedback will help.
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Three to a four Blade, you will want to run less pitch than you are now. Example: The Mirage Plus is a good all around 3 blade and 19p for a 23' hull would run the 17p revolution 4 to keep the same rpm range. Most four blades you run less pitch as a similar three blade.
Also you mention running Aluminum instead, you will not get good performance from an alum. prop as you will with stainless steel or a good stainless alloy. I would buy used and find a good prop that way and if you need more or less pitch you can have it pitched up or down and also save it as a spare and buy a second higher or lower pitch. Its nice having different props to see the differences in them. Every boat and use may need something different than the last. What works normally might not work for your boat. It can be a crap shoot sometimes selecting a prop. Ken at propgods has helped many up here and he knows much more than me so reach out to him too. He has a site with a form or call him. He is the PROP MAN!
If you want top end performance the Enertia Mr Shrimping mention will probably work best for that but it is still a 3 blade.
Reviloution 4, is a good all around prop, but you will not get as much top speed with it as others.
A Bravo 1 four Blade would be good for top end but the lowest pitch you can get is 22p but I think mercury racing has 19p custom brovo's that have PVS that have been modified for high power outboards.
I have ran and keep Mirage Plus props around and Rev 4's for running different outboards on different boats and really want to get a set of Enertia's. They suppose to me the cats meow. Also they have Enertia ECO props that will be the most efficient out of most you will try for getting good Fuel Efficiency. They are made of X7 alloy and are stronger and have thinner blades for less rotating mass and cut the water better. They have large blade area and hold the water well too. I haven't ran these but read lots of good things about them.