9/19 update
I also got word from Jim of Southern Comfort Marine refrigeration that he can replace our refrigeration unit for $1200 installed. Could be better, but it could be a lot worse I suppose.
Dad and I changed the oil in Perkins this morning, which went well. It takes just about five quarts. I got a cool little brass Jabsco pump for pulling the oil out of the sump which worked great.
Tomorrow we'll take Lark on the ocean for the first time, weather permitting. The forecast just offshore is for southwest winds 10 to 15 knots and seas 2 to 3 feet. Low tide is at 12:34 which will be favorably both for leaving and returning..