Boat seat base problem...
 

New seat base has been sitting around for a long time... I finally found where I forgot it lol. Last time I tried to get the bolts out three came out and three spun free but couldn't get up out of the holes and when I tightened them down they grabbed again so I just left it. Today I got enough pressure under the base to force the bolts up once they were
loose. Well the problem lies when the nuts that were half ass glue to the under side of the fiber glass fell on top of the ballast and fell off center so I can't get them with even a longer bolt.... if you were to commit to a repair option which way would you address the three holes? I think I should cut a 2" holes in the middle and glue the washers nuts back under the hole since the seat base will cover the hole.. there is not a lot of aluminum towards the edge of the base to drill the hole much bigger in order to thread the fiber glass and install a larger bolt plus the base holes are tapered.https://uploads.tapatalk-cdn.com/201...c47647ac00.jpg

No room to access from the underside?

Bore a hole in the middle large enough for you hand to fit through the hole and then glue in flange nuts from the underside.

No access from the under side. Hole in the middle is last resort, I ordered stainless threaded inserts to try first and then hole saw. Thanks!

https://www.summitracing.com/parts/w...FRWewAod_PUHrg
this tool will help u out if its not the right size theres one out there

Hey! That might work better than the
https://www.fastenal.com/products/details/0123228

Boat seat base problem...
 

Nutserts like that wont work I fiberglass, only in metal.

Thanks for the heads up!

I'd hole saw the portion under the base, you'd never see it and it won't lose much strength, if any. Then, bolt and epoxy the nuts to the bottom of the floor. Note, rub beeswax or parrafin wax on the threads of the screws before you put the epoxy on and you'll have no trouble unscrewing them later.

I'd probably go with some cool looking allen head screws as well.