-What should I use to clean out the old glue material left in the o-ring grooves between the upper and bell housing and Y-pipe?
-How clean does the groove have to be?
-What glue should I use to hold the new o-rings in place?
-What glue should I use to hold the large round rubber gasket in place on the transom assembly?

I used weather stripping and gasket adheasive made by 3M pretty cheap and found at any auto parts store worked good sets up pretty quick