Does anyone know much about a 3cyl 52ci Merc 40? i’ve got a 97 that i’m hoping there are some easy mods like changing out carbs to bump of the HP on.

from what I can tell it is a bit of an odd motor, looks like in 96 and the first part of 97 the 40hp was a 4 cylinder and then in 98 is when Mercury switched to the 3cyl 59ci 40,50, and 60. In 91-97 they had a 3cyl 50 and 60 that were both 52ci. Anyone have any clue what the difference is between my 97 40 and those?

Appreciate any advice!