Can anyone please tell me what kind of speedo I could install on my boat? electric or mechanical?, I remember many years ago the speedo was mechanical, there was a bracket at rear of boat on transom with plastic tube which folded down into wash before sailing, are these still around? or what is electic like, my engine is nice old 1984 Evinrude 40HP, I know that GPS is the way to go but would like to keep it simple, any help would be great, JBD
