I think there's some places linked in the Links section that do speedos, but it may be it just needs a good cleaning, you should be able to see what's up if you open it and drive it with a drill motor to watch the action, usually in reverse
"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
