Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-05-2018, 03:59 PM   #1
Lt. JG
 
Join Date: Jun 2018
Location: Michigan
Posts: 46
Question twins

I have a 99 3000scr with twin mercs in it. This may be a silly question but I'm thinking of putting in more horsepower and do the engines spin in the same direction and the outdrives perform the counter rotation???
__________________

jeffronin3 is offline   Reply With Quote
Old 10-05-2018, 04:25 PM   #2
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 6,441
Default

What drives do you have. Based on the year of your boat both engines are standard rotation and one drive is counter rotation. I believe you have Bravos so itís a simple change in the shift mechanism in the drive that makes the change.
__________________

__________________
Mike
mmwjr is offline   Reply With Quote
Old 10-05-2018, 04:58 PM   #3
Lt. JG
 
Join Date: Jun 2018
Location: Michigan
Posts: 46
Default

I have Bravo 2's and that's what I thought but just wanted to make sure. Thanks Mike!
jeffronin3 is offline   Reply With Quote
Old 10-05-2018, 05:07 PM   #4
Moderator

 
Join Date: Apr 2008
Posts: 4,166
Default

The rotation should be in the drives, not the engine.
shrew is offline   Reply With Quote
Old 10-05-2018, 06:26 PM   #5
Lt. JG
 
Join Date: Jun 2018
Location: Michigan
Posts: 46
Default

Great thank you again!
jeffronin3 is offline   Reply With Quote
Old 10-06-2018, 02:09 AM   #6
Lt. Commander
 
gmc60's Avatar
 
Join Date: Dec 2014
Location: Mass
Posts: 201
Default Barvo 3 ?

Soo my 1996 Maxum 7.4 Bravo 3 one drive is counter rotation ?
gmc60 is offline   Reply With Quote
Old 10-06-2018, 03:13 AM   #7
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 6,441
Default

Quote:
Originally Posted by gmc60 View Post
Soo my 1996 Maxum 7.4 Bravo 3 one drive is counter rotation ?
I donít believe they set the Bravo IIIs up with countertotating as the BIII already has torque cancling by its nature. However by their design sharing the upper as the other Bravos they can be set to do so.
__________________
Mike
mmwjr is offline   Reply With Quote
Old 10-06-2018, 04:32 AM   #8
Lt. JG
 
Join Date: Sep 2016
Posts: 49
Default

Guys, just look at the prop walk on each drive. They're always supposed to cancel each other out except in opposite directions.
dannyrayz is offline   Reply With Quote
Old 10-06-2018, 11:45 AM   #9
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 6,441
Default

Quote:
Originally Posted by dannyrayz View Post
Guys, just look at the prop walk on each drive. They're always supposed to cancel each other out except in opposite directions.
Yes B3s do this as it has two prop shaft that rotate in opposite directions. On single prop shaft drives; B1, B2, and Alpha twins one drive is standard rotation and the other counter rotation.

The OP of this thread was asking if he had a counter rotating engine or if the drive took care of this, answer is the drive.
__________________

__________________
Mike
mmwjr is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 05:59 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.