speedometer

OK I think I have an electrical problem with my speedometer gauge. I turn the ignition on and the speedometer jumps up to about 65 and stays there till I turn it off. Any ideas how to troubleshoot this or where to look?

I just bought a 97 175 5 series and some of the gauges do not work. I can not find any links to fix this. Oil pressure and up/down gauges do not work. The tachometer works, but can reads high intermittently. Speedometer seems to be a few mph short of my cellphone GPS. I am guessing I have a...

This is a $45 panel from Amazon targeted at truck drivers so it should handle the vibration. I spliced into the leads for the depth finder out of the MUX box. The red with blue stripe that gets hot and a black for ground. Now I have a reminder the ACCY button has been pushed. One writer said you...

I try to bring back the boat to original. For now it is 99% original I think. Pre owned by 1 owner for 46 years! I am looking for an original speedometer, a fuel meter and some other small parts. Anyone suggestions?

I have an '04 240 Sundancer with the Mag 350. So my fuel gauge and speedometer are not working. They worked at the end of the season last year. On the first startup this spring they weren't. I replaced the sending unit. The fuel gauge is the last gauge in the order. The speedo is next to...

Depthfinder transducer location on Sundeck 240? I bought a used 2005 SD240 from a friend this spring. All is well, absolutely love the boat, but my depth gauge is wonky. I am awful nervous with that expensive BIII in the water not knowing the depth. I mention that I bought it from a friend to...