When did Yamaha Outboards change shape?

Could anyone tell me when the shape of the Yamaha 8/9.9 outboard changed from the squarer shape to the current rounded shape please?

1996 for the 9.9 ITYWF. Then again for the fourstrokes ?

Not until the 4 strokes for the 8hp ???????

Find a parts list and check !
 
Did the rounded shape succeed the white? I thought it's predecessor was the squarer grey shape.

When I said the rounded grey replaced the squarish white I meant on my boat as opposed to the way the range of engines evolved.
The engines I'm talking about are the four strokes and you may well be right about a squarish grey engine in the range.
 
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