Reply To: Re Fitting Bailers
all the boats i ve fittted bailers to I have used the rubber gasket inside, and then put a bead of sealant around the hole externally, as the body of the bailer sits in place. You have to keep it as a clean smooth bead all the way round though. We have an adhesive cleaner at work (much like acetone but less agressive) by 3M which is good for wiping excess away if you go wrong – it may be available from a hardware store?
As Terry says, this is all based on the assumption of course that the gaskets are new and in good order (the bolt holes are particularly suseptible I find)! If in doubt it doesnt hurt to put some sealant on the inside too.