I remember those Johnson Seahorses OB's they were very popular as soon as the old putt putt engine clinker/carvel launches had had their day and people turned to aluminium runabouts.
Here's a photo from 1986 of an old wooden clinker with an inboard front flyer putt putt motor, this boat was about 50-60 years old when I got it in the '80s I loved this boat!
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An aluminium boat has a lot less maintenance but not as nice fishing out of compared to a large heavy timber boat, fouling is still the biggest problem as we get a large barnacle, oyster and weed growth in as little as 6 weeks. The Johnson 15hp has been retired and the boat now has a Yamaha 25hp
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