Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old August 28th 03, 04:03 AM
Bill Netterville
 
Posts: n/a
Default Counter rotating engine question

I have a SeaRay with twin OMC 4.3 sterndrives. Looking at the props, I see
that they turn in different directions - counter-rotating.
I am kind of new to the twin engine scene and had a question that I can't
find the answer to in my manuals.

How is the direction of rotation changed from a "normal outdrive"?
Does the engine "run backwards", or is there a gearset in the outdrive that
changes the direction?
If in the outdrive, is the change in the upper or lower housing? Could you
swap out the gearset in a
"normal outdrive" and make it counter-rotating?

Inquiring minds want to know.....

Thanks in advance....
Bill



  #2   Report Post  
Old August 28th 03, 02:02 PM
Paul
 
Posts: n/a
Default Counter rotating engine question

Hey, that's an excellent question. I have twin Alpha I's and I would be
interested to know too.

"Bill Netterville" wrote in message
...
I have a SeaRay with twin OMC 4.3 sterndrives. Looking at the props, I see
that they turn in different directions - counter-rotating.
I am kind of new to the twin engine scene and had a question that I can't
find the answer to in my manuals.

How is the direction of rotation changed from a "normal outdrive"?
Does the engine "run backwards", or is there a gearset in the outdrive

that
changes the direction?
If in the outdrive, is the change in the upper or lower housing? Could you
swap out the gearset in a
"normal outdrive" and make it counter-rotating?

Inquiring minds want to know.....

Thanks in advance....
Bill




  #3   Report Post  
Old August 28th 03, 03:37 PM
F330 GT
 
Posts: n/a
Default Counter rotating engine question

Hey, that's an excellent question. I have twin Alpha I's and I would be
interested to know too.

"Bill Netterville" wrote in message
m...
I have a SeaRay with twin OMC 4.3 sterndrives. Looking at the props, I see
that they turn in different directions - counter-rotating.
I am kind of new to the twin engine scene and had a question that I can't
find the answer to in my manuals.

How is the direction of rotation changed from a "normal outdrive"?
Does the engine "run backwards", or is there a gearset in the outdrive

that
changes the direction?
If in the outdrive, is the change in the upper or lower housing? Could you
swap out the gearset in a
"normal outdrive" and make it counter-rotating?

Inquiring minds want to know.....

Thanks in advance....
Bill








It's all in the lower unit and yes you can change the gears. It's alot easier
to just change the lower unit, though. A good used lower unit can be found for
about $300 or a rebuilt for about $500.


Barry
  #4   Report Post  
Old August 28th 03, 04:13 PM
Paul
 
Posts: n/a
Default Counter rotating engine question

It's all in the lower unit and yes you can change the gears. It's alot
easier
to just change the lower unit, though. A good used lower unit can be found

for
about $300 or a rebuilt for about $500.


Well that makes sense.

My port outboard leg (whatever you call it, lower unit, the part the sticks
through the transom) has a label on it that says "counter rotating". I
suppose if it was the engine that ran backwards they would have put the
plate on there.

I suppose I could put a bit of thought into these things.




Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Usage of motoroil Steven Shelikoff General 153 September 17th 03 12:55 PM
engine paint in fuel system David Ward General 0 August 20th 03 04:20 AM
ENGINE OVERHEAT Coff General 2 August 4th 03 11:39 PM
Excessive Oil Injection (I think) Grumman-581 General 7 July 20th 03 12:05 PM
Volvo Penta (EFI) engine starting problem Larry Buss General 0 July 19th 03 06:19 AM


All times are GMT +1. The time now is 11:52 AM.

Powered by vBulletin® Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2004-2019 BoatBanter.com.
The comments are property of their posters.
 

About Us

"It's about Boats"

 

Copyright © 2017