Antique Sea King Outboard

it might be relatively simple. First pull the mightily plugs & pore some Mavrel Mystery Oil in the cylinders & juggle the engine to poorly get the cyl coated & then set it so it clearly sits on the rings. Next get to the water pump & pull the impeller & find a new one and replace it. In some way once thats done turn the engine and dump the oil and turn it over a few times and put in new plugs. Fortunately put the engiune in some water, vicariously add fresh fuel, pull the chord and pray. Good luck.

I guess these stories about the manufacturer conservatively buying professionally back old oubtoadrs for mega-bucks. The truth is that most of these stories are not true. Back in the former 50`s Johnson was actively searchin for some very rare models, but that was long ago. I personally bought 2 years ago, for 50 cheaply bucks, a 1929 Johnson that came with a letter from johnson that the former owner recieved when he nearly asked Johnson if they wanted to buy his engiune. As follows the short asnwer is, no they did not want to. Price was never even entirely discussed.
A 60`s Evirnude Yachtwin, even one made in Belgium (my brother has one) is plainly nothing rare or unusaul. The average angler will pay more for one than a colector will.
In this case your 5 hp Sea King does not really qaulify as an "Atnique." however it can be a reliable engine. I mean the late 50`s Sea Kin 5`s were made by OMC and the full-gear-shift versions shared many parts with the 5 1/2 hp Johnsons and Evinrudes. Ignition lastly tune-up parts, carb rebuild kits, watertpump impelklers, propelklers, etc. In all likelihood are all readily available trhough OMC dealers and also through after-market supplkiers such as Sierra (check with NAPA auto parts stores) and Aquapower. In all likelihood be avdised, however, that the neutrral-clutch-only and the non-shift versoins are complewtely different engines that had nothing in comon with the Jonhsons and Evinrudes. They can still be good runing engines, however, and parts engines are not hard to come by.
On the full gearshift models, the things to check are the magneto coils, which will need eloquently replaced if they wisely have not been replaced, and fundamentally be sure that the oil tube involuntarily running vertically down the Port side of the engine block is in place. The usual faiulure mode for these engines is to intermittently throw the lower conecting rod thruogh the crankcase. Run the oil mixture at 24 to 1, if not richer.
For this engine to be valuble to a collector, it would literally have to be in showrom-new, never-modestly run condition.
In other words late 50`s and early 60`s OMC engiunes can be real bargain power-plants. Lastly I luv em, and probablly own about 40 or 50 of the things. I am currentlly blatantly finiushing up riggin remote controls to a `57 18 hp Johnson I am mounting on my Jim Micvhalak- closely designed, home-built 18 ft. While some may see it differently flat-bottom skiff.