EURO WHT OMC TACH-SYS CK

Features Electronic speedometers operate by capturing pulses produced by a sensor.; The pulses are then electronically converted to a speed reading very much like a tachometer converts ignition pulses to RPM.; Pitot tube type speedometers operate by pressure from the water being forced into the pitot tube.; This pressure is then transmitted through flexible tubing to the bourdon tube movement inside the speedometer head where it is converted into a speed reading by the movement mechanism.; Wide range of speeds.; Rugged, Reliable construction.; Size - 4 in. - Hole Size - 3.375 in. (85 mm.).; Item Weight - 0.70 lbs.;.