Anyone who owns 70's vintage SRV's, do you know what kind of speedo they used from the factory. I cannot find any documented info on how the factory speedo get its signal.
Ive got the SRV 220 1979 with the MR type outdrive 898 merc. The speedo uses a pitot tube pick-up usually mounted to the transom next to the outdrive where the hull and transom meet. The pitot tube (plastic hose) about 1/4" dia. runs from the pick-up through the transom above the waterline and directly to the dash gauge. If the tube is there and you blow into it the gauge should register. Hope this helps
