The advice I'd give you get a Mercruiser maintenance manual for your power package. More than enough pictures and the proper sequence of disassembly. You'll save enough money to pay for the manuals.
I have the whole manual. All it shows for starter removal is a picture of a starter and the words " Remove 2 Bolts" "Repeat reverse to install". Great manual.
I`m assuming these are inboard bob tails, point to remember is a standard rotation motor uses a "reverse rotation " starter and a reverse rotation motor uses a"standard rotation "starter