Sun tach sending unit
Hi everyone. In my '62 SS, I'm running a factory Sun tach and sending unit. The sending unit takes 2, 1.375 volt mercury batteries which are no longer available. I know these units can be converted over with modern electronics to eliminate the batteries. I've gotten prices to do this conversion from $265.00, which I thought was a lot, to $350.00 which I feel is outrageous and would never consider. I searched on line but couldn't find the exact voltage that I need. I did find double AA alkaline and lithium batteries at 1.5 volts each. Is anyone still using these factory units, and if so, did you convert or find another battery source?? I don't mind changing the batteries every few years but I don't want to damage the sending unit with more voltage. I can't see how .250 more volts, between the 2 batteries, would hurt anything. When I took my sending unit apart, it had 2, 1.5 volt Duracell Procell batteries, that someone had installed. I only ran the motor a short time before removing it, and the tach seemed to work fine. Any suggestions would be appreciated. Thank you, Carmine.