I have taken this off my console so is up for grabs, I have never had the bit that goes on the transom to provide the water pressure so I don't know if it works but if I blow hard down the tube then the needle moves!
There is also a light but also untested. Might be fun for someone and is yours if you cover the postage and a pint
I think it is standard instrument size as the new tachometer has gone in the old hole!
Mellifera
