Re: 2002 Honda 90 HP tach not working
You are correct about the speedometer. You have an obstruction somewhere. Try removing the hose from the behind the speedometer gauge and then blow out whatever is in there. You can used compressed air if you want. If you store you engine down in the water, the speedometer tube will continue to get clogged.
For the tach, try removing the wire terminals from behind the tach gauge and give them a thorough cleaning. You could have a bad ground somewhere. Also, if your tach has a selector dial on the back, make note of where the dial is pointing and then turn the dial back and forth. Put it back to the position you found it in.