Does anyone know where the display for the Yammy F115 4s gets its speedo reading from, is it from a sensor on the lower part of the engine/gearbox or is there likely to be a log type device that it uses in/on the hull?
The reason I ask, is that I have found a device under a deck hatch that resembles a through hull transducer (even though the boat has no sounder fitted). The device is round, sits in a plastic mount that is bonded to the lower hull and has a red and black wire coming out of it, both sealed with white "gunk".
The wires for the device disappear under the deck and then up inside the console and I haven't found where they end up yet. It's a bit of a snakes wedding of wires in there til I get to sort it out!
I haven't got a photo of it but will try to take one soon.
In the mean time if anyone can tell me what it is (or likely to be) that would be good.