Tested the motor I have for my S.I.B today. It's a 1973 Johnson Sea Horse 4Hp. It started after just some minor persuation, and purred like a kitten, just like my wife , who is also a 1973 model :-)
Going fising as soon as the I get a calm day out there. I only have a 8,5 foot soft inflatable boat, but it's got a hard deck so okay for fishing :-)
Here is a pic of the motor:
And of my setup taken a couple of years ago.