I have a
Harken furler for the headsail on our boat. It is a Mark II, probably from the late 1980s. From a search on their website, I understand that
Harken is currently selling Mark IV models. Can anyone tell me what the difference is between a Mark II and a Mark IV? I am less interested in cosmetic changes, but rather anything that substantially affects it's efficiency, safety and general operation.
Thanks,
Frank.