Go Back  Offshoreonly.com > Technical > General Q & A
Help needed, Drive suggestions >

Help needed, Drive suggestions

Like Tree7Likes

Help needed, Drive suggestions

Reply

Old 02-12-2019, 08:15 AM
  #1
Registered
Thread Starter
 
Join Date: Feb 2018
Posts: 5
Default Help needed, Drive suggestions

Hello all, I am new here and I will start by saying that I am in a completely different league with drives than you guys. I have a fishing boat in the Carolinas, (dont kill me) that weighs around 10,000 LBS with a 300 HP yanmar diesel. The boat has a Bravo 3X drive that has been very good to me so far. I know you guys put a whole lot more horsepower and torque on drives than what i am, so i was hoping for some information for a replacement drive that would hopefully last me a long time. Right now my drive is still running strong but I know the inevitable is coming at some point. I guess I was thinking that if the drives that you guys are running are holding up for a period of time with the huge amount of horsepower that are being put on them, that maybe they would give me a lot longer drive life. Any suggestions will be very much appreciated. I also am not against going with a single prop versus the duo prop I have now. I really need an education on these drive and hope somebody here may be of some help.

Thank you.
WHITEOWL is offline  
Reply With Quote
Old 02-12-2019, 12:33 PM
  #2
*
Platinum Member
 
madbouyz's Avatar
 
Join Date: Nov 2002
Location: PortRoyal Bermuda
My Boat: '73 Magnum 25 '66 Donzi 19
Posts: 711
Default

Volvo DP stuff is far superior to the Merc . Go on to their website and look at what they have. Some of their larger (and little known about) units are for bigger diesel applications in heavy boats. If that B3 has treated you well in a 10,000 lb 300hp diesel boat you're doing something well . Is yours a straight installation or is it jackshafted ?
madbouyz is offline  
Reply With Quote
Old 02-12-2019, 01:37 PM
  #3
Registered
 
Join Date: Jan 2006
Location: Peoria, IL
My Boat: Jefferson Marlago FS35, Formula 330SS
Posts: 2,361
Default

IMCO SCX is a direct swap. Im not sure if you could put the B3 lower on the SCX upper. The bravo upper is the weak part.

It might be possible to Frankenstein an SCX -4 upper to a normal length lower and add some spacers so you could run a large diameter prop to get some blade area like the B3 has.
hogie roll is offline  
Reply With Quote
Old 02-12-2019, 01:53 PM
  #4
Registered
Thread Starter
 
Join Date: Feb 2018
Posts: 5
Default

The boat has a jackshaft to the drive. The B3x drive that is on the boat now has somewhere around 1000 hrs on it with not major issues. I do have a drive shower and my cruise is around 3400 RPM. A direct replacement would be great, so I could hopefully just bolt up and go when something does happen. I can always just go back with the Bravo but I like overkill and not having to worry about things. Thank you for the input and any more is greatly appreciated as im trying to get educated.
WHITEOWL is offline  
Reply With Quote
Old 02-12-2019, 03:41 PM
  #5
GPM
Registered
 
Join Date: Mar 2004
Location: Pa
My Boat: Sold my DCB
Posts: 2,383
Default

Originally Posted by hogie roll View Post
IMCO SCX is a direct swap. I’m not sure if you could put the B3 lower on the SCX upper. The bravo upper is the weak part.

It might be possible to Frankenstein an SCX -4 upper to a normal length lower and add some spacers so you could run a large diameter prop to get some blade area like the B3 has.
Don't you need a HP gimble and Imco helmet to install the SCX on anything ? Plus an external trim gauge sender.
GPM is offline  
Reply With Quote
Old 02-12-2019, 03:44 PM
  #6
GPM
Registered
 
Join Date: Mar 2004
Location: Pa
My Boat: Sold my DCB
Posts: 2,383
Default

Originally Posted by WHITEOWL View Post
The boat has a jackshaft to the drive. The B3x drive that is on the boat now has somewhere around 1000 hrs on it with not major issues. I do have a drive shower and my cruise is around 3400 RPM. A direct replacement would be great, so I could hopefully just bolt up and go when something does happen. I can always just go back with the Bravo but I like overkill and not having to worry about things. Thank you for the input and any more is greatly appreciated as im trying to get educated.
1000 hours, buy another one just like it or rebuild yours before it breaks.
Griff, JaayTeee, RBeyer and 1 others like this.
GPM is offline  
Reply With Quote
Old 02-12-2019, 11:41 PM
  #7
Platinum Member
Platinum Member
 
RBeyer's Avatar
 
Join Date: Nov 2003
Location: Antioch, IL
My Boat: 1995 Saber Cyclone 28
Posts: 648
Default

Originally Posted by GPM View Post
1000 hours, buy another one just like it or rebuild yours before it breaks.
Agreed!
RBeyer is offline  
Reply With Quote
Old 02-13-2019, 01:32 AM
  #8
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha
My Boat: .......32............. ............Active Thunder....
Posts: 16,950
Default

The odds of anybody on OSO having 1000 hrs on an outdrive are slim to slimmer. Just stick with what you've got.
Knot 4 Me and VoodooRob like this.
Griff is offline  
Reply With Quote
Old 02-13-2019, 06:45 AM
  #9
Registered
Thread Starter
 
Join Date: Feb 2018
Posts: 5
Default

The boat has just over 1600 hours on it now. The previous owner replaced the drive at 600 hours and sold the boat. My world is a lot different as far as excelleration and running. I am honestly pleased with what I have but figured that I would never get this lucky again, so was hoping when I do have an issue to go with something better. Is there a better gear set to go with? And also who does the best at rebuilding these drives?
WHITEOWL is offline  
Reply With Quote
Old 02-13-2019, 08:24 AM
  #10
VIP Member
VIP Member
 
VoodooRob's Avatar
 
Join Date: Jul 2011
Location: Cleveland Ohio
My Boat: 07 38 Lightning 600SCIs
Posts: 1,900
Default

Originally Posted by WHITEOWL View Post
The boat has just over 1600 hours on it now. The previous owner replaced the drive at 600 hours and sold the boat. My world is a lot different as far as excelleration and running. I am honestly pleased with what I have but figured that I would never get this lucky again, so was hoping when I do have an issue to go with something better. Is there a better gear set to go with? And also who does the best at rebuilding these drives?
Hi-Performance All American Drive phase 1 thru 4 available
dcb likes this.

Last edited by VoodooRob; 02-13-2019 at 10:48 AM.
VoodooRob is offline  
Reply With Quote

OSO Sponsor
OSO Advertiser
OSO Advertiser
OSO Advertiser