Here’s the other page on discount marine parts that gives the over-view.
https://www.discount-marine-parts.com/ob_triton.html
From the picture I wonder if that is a tecumseh powerhead? Tecumseh made powerheads and sold them to various outboard manufacturers. If so; then you can look over the powerhead and maybe you will find a Tecumseh model number. Then you can look that up and see the HP. Look for numbers punched into the blower housing or for a small tag mounted on the engine somewhere,
