[Fr. Frank]

Originally Posted by McGillicuddy

... Moesly's originals used a small single battery (24's or so) in an era of much lighter motors.

My first Seafari 20' (a '69) in OEM configuration used a Group 3ET battery in a fiberglass battery-box below the deck just forward of the motor well. I think it was about 600 CCA, if I remember right. It was held in place by a rubber strap.

My best friend had a '70 Seafari sterndrive, and it also used a 3ET battery mounted in a factory fiberglass battery box right in front of the front motor mount of his Mercruiser 140, but his battery box only came about a third of the way up the battery sides.The box was glassed in between the motor mount and the fuel tank.

I recall that my '69 had a 47 gallon fuel tank and his sterndrive model only held 27 gallons.

A 3ET battery is long and narrow; about 20" long and only 4" or 5" wide, and about 9" tall or so, and the terminals were set side by side in the middle of the battery