Yamaha speed gauge reads "-"
Since I've had the new motor the speed gauge reads "-" at speed and the trip odometer stays at zero. I've disconnected the tubing from the gauge and blown compressed air through the tubing. My wife reports that the air coming out at the pitot tube on the lower unit is "forceful". The gauge shows numbers when blowing into the tube on the gauge side. I've been fiddling with this off and on for most of the season.
If it still doesn't work on the next outing, is there anything else that I am missing? The only thing I can think of is that there is something in the tubing that is acting like a one way valve.
Have boat, will travel.