I have a 1984 Catalina 30 and my tach died recently. Thus far I have been unable to locate a replacement Tach. It appears the unit I have may be the original. It was made by Teleflex. I called Teleflex today and they are looking to see if they still make it or a replacement. That call was made four hours ago and sense they haven't returned the call as promised, it may be a dead end. I also checked with Catalina Direct and they do not carry it. Any suggestions??