I recently bought a "new" boat with a 115hp Yamaha, and digital gauges. The gauges were both bad (LCD unreadable), so I purchased and installed new gauges. Problem is, the speedometer only displays a single bar ... no speed readings. I believe my problem is that the 1/16" hole in the leading edge of the lower unit is clogged up. My question is ... how do I unclog it?
Here's what I've tried so far:
Cleaned out the hole with a 1/16" drill bit.
Disconnected the "water tube" at the top of the lower unit and tried (a) blowing thru the tube, and (b) connected a syringe filled with water and tried forcing water down from the top.
Neither attempt was successful.
So am I going to have to drop the lower unit and replace the water tube ... or does someone have another suggestion?