Regular or Counter Rotation

[twag4]

How do I know if my mercruiser alpha 1, gen 2 is regular or counter rotating? The model is 1.81R serial OL433318.

 

[Haut Medoc]

Re: Regular or Counter Rotation

The engine is standard rotation if it rotates counter clock wise as viewed from the stern of the boat.....​

 

[Haut Medoc]

Re: Regular or Counter Rotation

On sterndrives counter rotation is achieved in the drive itself....​

 

[Don S]

Re: Regular or Counter Rotation

If it's a single engine installation, then it standard rotation. If it's part of a twin engine installation, then it may have one drive counter rotating.
A counter rotatation drive is not used on a single engine installation unless some cheap previous owner was looking for a cheap way out of a bind to sell the boat, and found a cheap counter rotating drive on ebay or something.