https://bringatrailer.com/wp-content...?fit=940%2C663
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...OVERDRIVE...overdrive spur gearset between the crankshaft and gearcase increases the input shaftspeed to the gearcase and produces the left-hand propeller rotation desired for formula 1 circuit racing... Mercury 360 APX https://start.mercuryracing.com/wp-c...on-Explode.png
...before re-rigging to triple outboards...https://scontent-atl3-2.xx.fbcdn.net...d4&oe=6040056E