[Dakota773]

I removed and replaced all but two of the plastic one on my 98.. The thru hulls in the head are actually under the sink. Still a little tight but mostly accessible. The ones that we're really impossible are the mid bilge and adjacent thru hull next to it just behind the ones in the head. On my boat those were just aft of the engine room bulkhead. To get to them you'd need to remove the water pump and probably other items at the front of the port engine and squeeze all the way over to the port side.

I chose to paint them black to match the boot stripe.

FYI in order to extract the plastic ones, you'll need to create a puller jig and use a heat gun to release the 5200. It wasn't to hard, but definitely needs some patience not to burn anything or break the plastic ones and make it a pain to pull out.

Don't forget to epoxy the raw openings to create a much of a seal on the core as possible in addition to the new sealant on the new thru hulls.

Definitely an improvement and probably a good investment on keeping water out if the plastic failed.