I'm asking for advice on removing the lower unit drain and fill screws, on a 2015 Tohatsu 9.8HP.
They both take a flat tip screw driver. Couldn't get them to budge. Tried holding the screw driver, and hitting the end of the screw driver with a hammer, while turning it, neither one will budge.
Tried an impact, nothing.
Any tips?

When I get them off, would like to replace with something other than one's that take a flat tip.