LOVE those old mercury's!! I have all the shop tools for them, the 1950's era lower unit/water pump spanners, and a complete set of the ring compressors etc. A hobby for me years ago was building mk58a's ( or any other period four cylinder merc ) STILL have enough parts around including a NOS lower unit for one....and a mk55. I WISH I had the skills to work on the wooden boats. In my collection of very close friends, one has a 20 century is excellent condition. Needs a few cosmetic things but the boat is garaged and solid. HOPING to video it this summer as it will be a project and hoping it gets into the water for the first time in almost 10 years.. ( That task has been assigned to me. )57 Mecury ( bought new by my dad) 20 hp & Thompson wood boat 12 ft- been in the family since I can remember some 69+ years. They haven't been in the water since the late 70's. trailer for same was made from model A parts- that disappeared somewhere along the line . I do not know if I can resurrect the motor or not and hate to take anywhere as they mostly over charge around here. going to need the pump impeller a tank and the line with proper connector fit the motor ( have no idea what happened to line- tank likely rusted out as I could not find it when I sold the folks place a few years back Used to repair the old Atwater , Kent , Elgin Merc and Johnson's back in 70's and 80's. I get home and there would be a note on the door about whatever someone had dropped off. all word of mouth. Had a 47 merc twin cylinder ( dad bought new back then) sold it a few years ago to a collector, 6 or 7 hp- tank on top, rope start, no recoil on those, no reverse. decals were in very good shape for the age. The motor went to bottom of Big Muskego lake, WI a couple times. I do not know the details on that but there is a repaired hole in the bow if the boat so that was likely one of them. Last Time the 57 Merc was used was for trolling Salmon on Lake Michigan in the late 70's.