High-Tech Marine Electronics for Boating Fuel Efficiency
Marine GPS/tachometer multifunction meter combinations work with both gas and diesel engines and provide digital readouts on backlit displays
. You simply replace your existing tachometer and mount the new device in its place. You can probably make a one for one swap on the boat's dash without cutting a new hole. Look for models with adjustable calibration for superior accuracy and displays that are easy to read in bright sun or at night, such as a Floscan multifunction meter with GPS interface for a variety of marine electronics combos.
High-Tech Marine Electronics for Boating Fuel Efficiency