The short answer is no. Boats are made with outboard, inboard-outboard, a hybrid using an inboard engine driving a stern mounted shaft that looks like the lower end of an outboard. Others use inboard engines, typically larger cruiser and specialty ski boats. Personal watercraft use a inboard engine powering a water jet pump. This jet drive system is also used in some boats. Most smaller boats are powered by outboards. New large outboards up to 400HP permit larger boats some over 30 ft long to be outboard powered. Most mid-size boats from 18-30 feet are powered by inboard-outboard systems to take advantage of larger automotive engines.
dont know if this is what you looking for but OBA is the the manufacture code of a company called ASF company was in Perry, Florida. but i think they just made boats.
1965 to 1970
You have a 1971 Us Made motor.
A 1957 Johnson 7.5 hp outboard motor typically weighs around 60 to 65 pounds (27 to 29 kg). The weight can vary slightly depending on the specific model and any additional equipment or modifications. This lightweight design made it suitable for small boats and easy to handle for transportation.
Synthetic Rubber
23 years old made in 1988
Caravelle boats are no longer made. They were motor boats that were 18 to 28 feet. They were used for fishing.
Model number 65ESL73R would be a 1973 model, 65 hp Johnson outboard.
A Johnson outboard, model number 85TL79R would be a 1979 model, 85 hp.
86 model made in September
model # is year made last two didgets
1981