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thinking of adding a speedometer to my boat , been looking on line and boy there are alot. looking at a 55 MPH.... now if i buy a gage is there a certain pick up cable i need per the MPH gage or will they all most all gages?
speedo's mostly use a pitot tube and that basically sucks up water into a tube and the gauge reads the pressure. I think most are compatible.. GPS speedometers are out in the markets now and they can be different, needing special senders ( GPS locators ) and such
If you have a smart phone you can just download a speedometer AP which uses GPS for tracking your speed. I just downloaded a free AP yesterday and while I have not had it on the boat yet I compared it to the speedometer in my truck on the drive home from work and it appears to be pretty accurate at least between 20-65 MPH. Did not check it at low speeds.
They sell transom mounted pilot pickup tube bases. If the speedo takes a pickup tube, anyone will work. The only other wiring needed on the speedo is a + and -.
