identify 20 hp yamaha outboard

[simekko]

I have an older 20 hp 100:1 two stroke yamaha outboard that has lost its model number plate. Has passed through several hands so not sure of the age.
I would guess between 10 and 20 years.

It has the numbers 6L2 stamped on various parts of the power unit.
Any ideas? I need some parts but seems limited success without a model number.

[boats.net]

No, the serial number was only listed on the serial plate.