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stupid question..engine rotation..

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Old 10-27-2009, 04:57 PM
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Default stupid question..engine rotation..

Ok so I have a question about twins...I have never owned a boat with twins, but Im look to buy a new motor for my boat, (single) are the motors counter rotating? A guy has a built 454 for a good price, kinda hard to pass up, but I dont know if the motor is counter rotating or not.Or is it just the outdrive that turns counter???
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Old 10-27-2009, 04:59 PM
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It's possible to build a counter rotating engine, but 99% of the time it's the drive that reverses rotation.
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Old 10-27-2009, 05:11 PM
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If it is an outboard boat then more then likely it will turn in the standard rotation. If he had a inboard boat then it could go either way.
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Old 10-27-2009, 05:16 PM
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Doesn't seem like many performance boats are counter rotating, but I had an old silverton with Chrysler 318s one of which turned backward. Prev owner had changed the plugs, and used the other engine as a guide to hook the wires back up. That didn't work out too well for him. Easiest fix of my life.
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Old 10-27-2009, 05:32 PM
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About the only things that use counter rotating engines
are inboards.

Stern drives use the drive to determine prop rotation.
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Old 10-27-2009, 05:40 PM
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no its a 454..with a bravo one, so the motors turn the same way, but its the outdrive thats counter or standard rotation correct..just dont wanna buy this motor, and it be a conter rotation motor, cause it came out of a fountain with twins in it..
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Old 10-27-2009, 06:39 PM
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iF ITS FROM A FOUNTAIN WITH A BRAVO DRIVE ITS STANDARD ROTATION.
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Old 10-27-2009, 07:10 PM
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Quote:
Originally Posted by tms1155 View Post
iF ITS FROM A FOUNTAIN WITH A BRAVO DRIVE ITS STANDARD ROTATION.
ALL BRAVO DRIVES USE STANDARD ROTATION ENGINE,ON TWINS,THE PROPSHAFTS ARE COUNTER ROTATING.IT IS IN THE WAY THE DRIVES ARE SET UP.
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Old 10-27-2009, 07:15 PM
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The 39 Ocean Express I had was equipped with Arneson 8's has counter rotating engines.

Picture of boat is at Custom Marine Sales in Lauderdale.
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Old 10-29-2009, 09:11 PM
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the set u mentioned is typically right hand rotation. the motor will not matter. however you could check out the drive to see which rotation it has been used for. the drive should be marked twards the top with a l or r indicating the rotation, and a gear ratio.
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