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The gauge is not showing speed or trip distance but is showing everything else. I cleared the pin hole out in the lower unit by using a 3/32 drill bit. The gauge still didn't work. I disconnected the clear speed hose from the black hose it was connected to in the motor. I sent air into the clear hose at the disconnect and the air could be felt coming out of the opposite end where it connects to the back of the gauge. I the sent air into the pin hole in the lower unit and I could not feel any air coming out of the black hose that I disconnected from the clear hose in the engine, thus indicating to me that the blockage is somewhere in the black hose to the pin hole or vise versa. Can you help me with any ideas in clearing the connection to the pin hole