HM Tach
I’m finally going to install my new-old HM gauge panel, and I need some help.
When I purchased my boat way back when, my then-original HM tach was inop. I installed Teleflex Heavy Duty gauges to replace the originals. I wired the tach like I’ve always done. Boat would not start, it would kick then immediately die. Someone on the Donzi board posted that the old tachs were wired strange, (the ignition ran through the tach maybe?) I don’t remember how I did it, but I rewired the tach to make it work.
Now I am wanting to install an old school panel. The main plug is exactly the same, (the only difference in the new panel is the lack of fuel gauge, I think it was for a 16. Im still looking for one to match…). I would like to be able to just plug it in, but I am a little worried about frying the pristine 45 year old tachometer…
I haven’t traced the wires out yet, but could someone explain how the originals were wired? I want to undo the “fix” I made to the wiring before I hook it up…
Thanks!!
Jim
1970 18 2+3 Hull #18-355 H/M 351W Volvo 250
07 Cayman IT IS BACK! - '13 Abarth Cabrio
PRESERVE, DON'T RESTORE