One last problem. Was spreading manure with the 2-110 last week, then the tach quit working. To be specific it tries to work, but only reads up to 1300 or so and won't read any higher. 

Pulled the dash and found a wore spot in the harness. Fixed the harness and started calling around for a new tach. Discontinued and can't find a replacement so far. Sent it in to Ag Express and they said they can't fix it.

Any other company's to try to get it repaired? Have tried Worthington Ag Parts and they don't have a used one.