Traditional hour-meters record time whenever the key switch is turned on, even if the motor is not running. The Mini Hour-Meter records only the actual engine operating time and does not need any connection to the boat or motor wiring harness. Measuring approximately 1 ½" by 2", the compact meter has an internal battery and hooks up easily by wrapping several turns of its wire around a spark plug lead. The case is encapsulated in epoxy making it water proof and resistant to vibration. Its small size and easy mounting with 2 included screws makes for a quick and easy installation almost anywhere in the boat. Retailing for less than $50, the meter is available from an Evinrude dealer (part #776020) or online from Amazon.com.