the speedo head is gummed up, see if this tip helps any ... likely you won't get the odometer working as the wee plastic tabs on the number wheels break easy when things get messy in there, might have to find another unit, or live without if you can get the speedo working smooth

Bill

Moved over to the Passing Lane

"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