yamaha 150 model info?

I have a yamaha 150 outboard i believe is a 1984. On one side of the tilt it says ETLN and the other side says AETO. Do i have a frankenstein that has been pieced together or is this common? Another thing that makes me wonder is if i go to a parts catalog search it always jumps from 115ETLN to 200ETLN, never showing a 150 ETLN. When ordering parts would it be ok to use the 200ETLN diagrams?

Thanks for helping me out on this.

[boats.net]

Yes it is a 1984 and the ETLN is the model number to use, that was one of the first Yamaha engines to be sold in USA. There is some of the old parts diagragms missing but the 150ETLK is the same motor.

boats.net

Thank you very much.