Giday I’m from New Zealand and my 1975 70hp Johnson is over charging up to 25 volts at the battery. I have replaced the rectifier and tested the old one and the new one both getting the same results. There is no regulator red wire runs straight to the battery wire on the starter relay. I can’t find any threads on over charging that relate to the problem I’m having and our local marine guy didn’t want to know because the engine is so old parts are to come by in New Zealand (fear enough) but I would like it to get me through this summer till I can afford to get another motor. Thanks in advance.