converting to 12vt, voltage regulator?

[laryh]

My 48 Mercury has rubber grommets on the bottom of the 6vt positive ground voltage regulator. The rubber is located where the screws mount the regulator to the firewall. I suppose the rubber prevents the regulator from grounding to the firewall. When going to 12vt neg. do I use the rubber grommets on the new regulator? I am using a new Painless harness and I called their tech line. The tech said he didn't know for sure though he thought the regulator should be grounded. Thanks for any help. Larry / Pa.

 

[Bruce Lancaster]

The regulator should have a wire direct from the G terminal on generator to baseplate of regulator. I would add a non-stock one from there direct to where battery is grounded to eliminate any potential resistance areas in ground path. I assume you are using '56--60's Ford generator stuff, which wires just like the 6v original.