easy way, if the ID tag is still there: Black tag=6v Red tag=12v applies to both starters and generators, if one is missing maybe the other is still there
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics