McMaster Carr for all your stainless steel screw needs, and you get them the next day.

Patrick and anyone else, do you know what the purpose of these are? (Found in cockpit floor)

laying on the bottom or attached to a structure ?

Were these attached to anything? maybe the side tank attachment brackets?

Look into a Garmin system. I have a 740XS that is attached above those two gauges, but you may be able to surface mount it into where those last two gauges are.

https://buy.garmin.com/en-US/US/p/11...n/010-01102-01

Every good tech has spare parts left over!

Heath,
Those brackets are shown in their original location in 2 pictures of post #28 so 2 per side. My guess is saddle tank mounting as the only other possibility would be for side panel attachment.
Andy

front brackets

both sets

Good eye Andy. I missed those photos. There is no evidence on the cockpit side trim panels of any attachments. I have what is left of one of the blocks of wood that the tanks sit on. Looking at the photos you provided there it seems that they were a hinge mechanism to rock the tanks out to possibly work on them without pulling the tank out from under the gunnel. But when you look at the block of wood in this photo the long screws running through the blocks would go into the cockpit floor. Still kind of a mystery. I’ve got the tanks installed now. So I’m going to go this route. Kind of a head scratcher.

Heath,
Patrick would be the only guy I know to answer since his boat has the same set-up but he would need to remove his port side panel to expose the 'head scratcher'.
Andy

Ill take a look at that the next time I see the boat. Im bringing it home for the winter to start getting it ready for Boyne Thunder next year. I should have an answer for you next week.