23 SEACRAFT PROP 3 OR 4 BLADE for 250merc

[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.

[shine]

I have a 4 merc 4 blade 19 pitch on my boat. A couple weeks ago I hit 50 mph at WOT running with a 10 mph tail wind. Engine is a 250 4stk Yamaha. Loaded down, she barely gets enough RPMs at WOT. With a t- top and lighter engine I bet you can get 50 mph pretty easy.

[GameOnSalmon]

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.

Makeover - U Might want to look at the Mirage in 17p with that set up it might spin a 19p maybe.

Also definitely check engine height with AV plate... These boats like to run at least 2" High on my last 23' i was running almost 3" high with the AV plate. No prop blow out and it would scoot.

Also as Shine stated... with his 250 having Trouble spinning the 19p i would say 17p.

Also u might search on Flyingfrizzle his threads. He runs a 225 merc EFI and has ran it on several boats.

Robert

[Bigshrimpin]

19 Enertia will get you above 50mph.

[Terry England]

Originally Posted by Bigshrimpin

19 Enertia will get you above 50mph.

Jeeze, would you guys just R-E-L-A-X. Anything over 17 knots blows the wine out of your solo cup and you gotta keep backtracking to get hats! You only have so many "frams" in any engine before it scatters and so many days out on 3/5 of Space Ship Earth that's covered with H2O before something breaks on you healthwise. It's hard to take it all in well, at a mile a minute. Go easy, prosper, live long and enjoy the trip!

[Bigshrimpin]

Originally Posted by Terry England

Jeeze, would you guys just R-E-L-A-X. Anything over 17 knots blows the wine out of your solo cup and you gotta keep backtracking to get hats! You only have so many "frams" in any engine before it scatters and so many days out on 3/5 of Space Ship Earth that's covered with H2O before something breaks on you healthwise. It's hard to take it all in well, at a mile a minute. Go easy, prosper, live long and enjoy the trip!

This is the best advice in this thread. I'm reading this while attached to IV.

[McGillicuddy]

Originally Posted by Bigshrimpin

This is the best advice in this thread. I'm reading this while attached to IV.

Roger that, Tim! Hang in there Bigshrimpin.

[flyingfrizzle]

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.

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.

[Makover]

I talked to Ken at gods,nice guy by the way and he say's REV4 17p or Power Tech OFS4 19p . I think PT he says low 50's. I may try that ,like the enertia 3 also. Will see keep feedin me more prop info, its cheaper than a engine for speed!

[kmoose]

If you are looking for top speed I would be looking at the 3 blade options. If you are looking for holding plane in seas and stearn lift I would go with a 4 blade. The Rev 4 is a great prop but didn't work to well for me as my Tsunami definitely doesnt need stearn lift.

It's funny how the obsession over attaining top speed outshines all the other important considerations like mid-range fuel consumption, sea handling and planing. I guess if I lived on a lake it would be more important but I use my SeaCraft in the sea where top speed capabilities fall to the bottom of list.