At first I thought those were bronze thru-hulls, but after reviewing pics again I see nuts on both ends, so they must be brass or bronze pipes. They will be much thicker than the thin OEM brass tubes that Strick shows in his reply, so what works on those thin tubes won't work on thicker pipe. If bedded in epoxy, they will be tough to get out, although heat will soften the epoxy and will probably help, provided you don't start a fire! Some sort of puller, based on threaded rod, nuts, washers, a larger-than-pipe socket on one end, and a tapered socket on the other end with the same OD as the pipe would probably work best.
I assume you think the scuppers are leaking if you're considering all this work, but if there is no obvious leak and they're bedded in epoxy, I'd be inclined to leave 'em alone! Grinding the end of the tubes flush with the nut on the bottom would improve the suction behind those wedges, however. The fishbox up front on the SF models also has a thin brass drain tube that's prone to leaking, so I'd check that to make sure it's not a leak source before attacking the scuppers! Denny
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