3 blade vs 4 blade prop
#1
Registered
Thread Starter
Join Date: Aug 2010
Location: St. Louis Mo
Posts: 13
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
so this may be a dumb question but I have a 3 blade 25p prop what would I gain if I went to a 4 blade 25p prop. someone was trying to sell one for $300 on CL.
#2
Registered
Join Date: Sep 2009
Location: Fort Worth, Texas
Posts: 71
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
More transom lift. But more is not always better. It depends on the application. Need more info. If your boat came w a 3bl, I'd prob. stay w that. The manufacture ususlly spends lots of money on research on what works best. One of the pros on OSO will chime in w more info.
#3
Registered
Join Date: Oct 2009
Location: Splendora, TX
Posts: 658
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
You will lose about 300-400 rpm at WOT with the same pitch. That can be fixed by getting them labbed. You will most likely have better cruise speed.....less prop slip. May loose a little at top end. I went from 4 blade to 5 blade. Had 28% slip at cruise with 4 blade. Had 13% slip at cruise with 5 blade Maxximus props. Since I spend 99% of my time cruising, I like more blades myself. Better gas milage.
#4
Registered
![Default](/forums/images/icons/icon1.gif)
You will lose about 300-400 rpm at WOT with the same pitch. That can be fixed by getting them labbed. You will most likely have better cruise speed.....less prop slip. May loose a little at top end. I went from 4 blade to 5 blade. Had 28% slip at cruise with 4 blade. Had 13% slip at cruise with 5 blade Maxximus props. Since I spend 99% of my time cruising, I like more blades myself. Better gas milage.
#5
Registered
![Default](/forums/images/icons/icon1.gif)
Where do you live in STL and were do you boat at?
#7
Registered
Join Date: Oct 2009
Location: Splendora, TX
Posts: 658
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
I wish I would have called BBlades.
I think they have a demo program or something.
I think I lost some top end, but I can't confirm.
By the way, the 5 Blade Maximus will create a lot of stern lift and the only weigh to change that is by getting them labbed, which I think creates SLIP.
Last edited by UrbanDisturbance; 08-27-2010 at 06:54 AM.
#8
Registered
![Default](/forums/images/icons/icon1.gif)
Urban, you gain 1000 RPM just by labbing the props? Doesnt sound right. Usually gain 2 to 400 RPM when labbed properly. Sounds like your just slipping. I would call Brett ar BBlades......
#9
Registered
Thread Starter
Join Date: Aug 2010
Location: St. Louis Mo
Posts: 13
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
Thanks for the info I think I am going to stay away from the 4 blade I don’t do a lot of tubing or skiing right now b/c my kids are still to young and I don’t want to lose any of my top end speed. JeffswavI live in Wentzville, I do all of my boating at the Lake of the Ozarks.
Last edited by nbishop57; 08-27-2010 at 01:54 PM.
#10
Registered
Join Date: Oct 2009
Location: Splendora, TX
Posts: 658
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
They changed the Maximus pitch from 28 to 25-26. The first time around, it slipped at 28% at cruise. They added more cup and now it is at 22% slip at cruise. I need to test my WOT to see if I need anymore cup. I sure miss my 13% slip at cruise that I had before it was labbed. My plan is to test my props at WOT this Saturday.