The 82a has been around since 2003 or somewhere along there

It has the cylinder bore of a 100 and a stroke less than that of the 72

Exterior size is much the same as the Saito 72. Has a common mounting bolt pattern with the 72, 45, 50 56, & 62. But the 72 and 82 are a little wider across the crankcase

The 82 has power very close to what the 91 does. It will pretty much swing the same props

There's a new 82 that will be available in a few months with a redesigned crankcase.