2004 X-80 Tachometer and speedo inop

[osbornda]

Aloha,

Both tachometers and the speedometer do not work. The backlight in all the gauges work, as well as the digital readings in the tach's. I have checked all the ground points, the ground distribution block behind the dash and all are clean and tight. All of the other gauges work fine, volt/oil/temp/depth finder.

I've read multiple posts citing MMDC failures and other issues. I live in Hawaii and do not have access to a Mastercraft service shop. It just appears wierd that both engines have the exact same issue...

Looking for any assistance.

Thanks,
Darrell