Picked up a SR4 last week with an old (1977) 50Hp Merc, pull start with remotes. Stuck in a new set of plugs and it fired up fine, ticks over lumpy, pumps water poorly but there's a new impellar there for it. Seller used it last summer during the holidays, it's been laid up since, doesn't look like it's been molested, plenty of grease about everywhere but other than that, I can't tell you much about it.
I'm going to stick my BF30 on the rib, so need something to replace the 30 on a fishing boat. Looking for anything between 20Hp and 40Hp, with remotes. Could be a small amount of cash your way for a good engine.