Guessing here, but it is prob configured for an external speed (paddle wheel) sensor and you do not have one? You need to disable it in the configuration I believe? Set paddle sensor to “no” on Cal 2 Tachometer Calibration Talks about it on page 2-21 of my smart craft ops manual. rev 90-10229023 203, 2003Last edited by brewcat on June 10th, 2009, 9:02 pm, edited 2 times in total.