Originally Posted by ADS
So a left handed outboard can only be used in conjunction with a right handed one?
No - I don't believe so. I would think that the only problem might be that you would always have to use left-handed props, and long term supply of some gearbox parts may be a minor issue.
Another consideration could be rigging and performance - it may be necessary to offset the engine to the left instead of the right, and the prop torque may not occur in the manner expected!