Offshoreonly.com

Offshoreonly.com (https://www.offshoreonly.com/forums/)
-   Formula (https://www.offshoreonly.com/forums/formula-36/)
-   -   311 Engine Question (https://www.offshoreonly.com/forums/formula/187943-311-engine-question.html)

wantsa311 06-01-2008 09:51 AM
311 Engine Question
 
Are both engines in a stock 311 "standard rotation"? What is actually different between a standard and non-standard besides the obvious rotation direction? Can you tell by looking at the cam or crank if it is one or the other?

If they are both standard rotation, how do I end up with counter rotating props? Is it in the outdrive somewhere?

Mentalpause 06-01-2008 10:39 AM
Originally Posted by wantsa311 (Post 2576059)
Are both engines in a stock 311 "standard rotation"? What is actually different between a standard and non-standard besides the obvious rotation direction? Can you tell by looking at the cam or crank if it is one or the other?

If they are both standard rotation, how do I end up with counter rotating props? Is it in the outdrive somewhere?
Every twin engine boat I have had the engines rotation is standard, the drives are set up with left and right hand rotation.

ThirdBird 06-01-2008 07:41 PM
Correct, rotation is contolled in the outdrive.

spazboz 06-02-2008 05:01 PM
Some inboard 454's were counter-rotation. Mostly in big cxabin cruisers. I have a pair of 427 Ford motors from a Chris Craft and one of those runs backwards too. I don't think any sterndrive application Big Blocks run backwards

ThirdBird 06-02-2008 08:00 PM
Originally Posted by spazboz (Post 2577443)
Some inboard 454's were counter-rotation. Mostly in big cxabin cruisers. I have a pair of 427 Ford motors from a Chris Craft and one of those runs backwards too. I don't think any sterndrive application Big Blocks run backwards
Right you are! Most older inboards had counter-rotating engines.

How about TRS drives, does the counter-rotation happen in the tranny or in the outdrive?

offthefront 06-02-2008 08:07 PM
Originally Posted by wantsa311 (Post 2576059)
Are both engines in a stock 311 "standard rotation"? What is actually different between a standard and non-standard besides the obvious rotation direction? Can you tell by looking at the cam or crank if it is one or the other?

If they are both standard rotation, how do I end up with counter rotating props? Is it in the outdrive somewhere?

Bob ..... The Bravo drives will rotate in either direction ....to counter rotate one drive is in Reverse ..... seems its done at the controls ....where the cables are attached ....m

Ted G 06-02-2008 11:26 PM
Originally Posted by ThirdBird (Post 2577656)
Right you are! Most older inboards had counter-rotating engines.

How about TRS drives, does the counter-rotation happen in the tranny or in the outdrive?
TRS are made right and left hand, the rotation is in the drive.


All times are GMT -5. The time now is 09:30 AM.


Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.