I have a 47 3100 with original 6v system. The generator has been rebuilt. I have a NOS voltage regulator. I am having issues getting it to charge, or at least it doesn't appear to be charging. My amp meter points straight down to the 0. If I turn on the lights it drops to the left showing discharge. It doesn't matter how much I rev up the rpms. If I put some pressure on/bend the spring tab to increase spring tension in the regulator, it points to 0 at an idle but does swing over to between 20-30 AMPS charge when I rev up the RPMS. I say bend the arm. I bends it is so little I don't actuall feel or see it bend any, I am assuming it is and tighening the spring becuase it appears to charge. I drive the turck and after maybe 15-20 minutes I notice the AMP gauge is no longer moving again. I can tap on the spring arm again and get it to start charging. It is very sensitive. It I tighten to spring too much the AMP meter buries to the right when I rev the engine. It usually takes me 3-4 attemps to get the arm in just the right location. One thing that concerns me is am I damaging anything if I just tighten it up and not worry about it burying the Amp gauge past the 40 AMP mark

Dave from Northern Kentucky
My 54 3100