1978 Boat, 115hp Merc. Purchased In 2003 And Only Used In Fresh Water Since

Bought in 2003 and used only in lake and upper bay every other year. since 2003 i have replaced entire floor supports and fiberglass (about 2012), replaced steering front to back (around 2007), and replaced motor (2018) with used but newer model (was a johnson 115 now a merc 115)Has trim kit and ran great last season. Turned it over this year no problem but didn't run it (Have not put in the water this season)Kids got older and wife doesnt like speed, wants a pontoon instead.