View Full Version : Tachometer/Speedo Help

06-17-2014, 10:12 AM
When we took out '01 205v out Sunday I noticed the speedometer wasn't working. This happens form time to time and we just use the PP. Usually I'll clean the pitot tubes and the speedometer starts to work again. The tach was working fine for most of the day but when we cranked up the boat to head in, it stopped working. However the hour meter still worked fine and all of the other gauges are working. I pulled the dash to check for loose connection and didn't see anything obvious.

Here are my questions:
1. If the MMDC is bad would any of the gauges work?
2. Can the tach fail and the hour meter still be operable?
3. How can you check the MMDC?
4. Any suggestions on what to look for?

Any information is appreciated.