This is what I know... Johnson 90hp OceanPro (from cowl hood) 2 stroke, premix fuel. 22.25" drive shaft (tip to face of foot) 13 spilne prop shat, 5.5" long.
This is on a February 2000 manufactured Muarell pontoon. I believe this motor was only made between 1999 - 2001. Tag is missing on pivot...