Re: finding parts for Sea King
Your motor is a Gale model 5S10. Helps to know that.
They were talking about SAE-30, 1953 oil. Nothing like 2012 SAE-30 stuff, so don't use it or any other car oil. Do use TC-W3 outboard motor oil. 1/2 pint per gallon is best (16:1). No less than 1/3 pint per gallon (24:1). TC-W3 is the standard that most everybody goes by these days and is available everywhere boats might be used.
Lower unit took "Outboard Motor Gear Grease". That stuff hasn't been made in years. Most pople use "Lubriplate 105 Motor Assembly Grease". Get it at NAPA Auto Parts Stores. Comes in a big squeeze tube.
Can't find any information anywhere??? You just did here. You also might want to visit the Antique Outboard Club's website,
www.aomci.org Thre are lots of those old Gale motors still around.