This is a great digital tachometer and hour meter for your engine. It features LCD display and re-settable hour meter. It is usually mounted close to the engine and it is small (about 3 inches by 1″ 1.2 inches) with a digital read-out.

When the engine is running, the display will indicate the RPM of the engine, when the engine is not running, the display will switch to run time, initially in minutes and then switching to hours once the total time reaches 60 minutes. It has a pressure point that can be pushed at any time to reset the hours back to zero.

It only counts when the engine is actually running instead of like most gauges, when the key is on.

There are three different models that fit either Mercruiser and Mercruiser Hi-Performance engines, 2-stroke outboards, or 4-stroke outboards. Yamaha has a similar monitor for their applications.

This is a great item to have, especially if you do not have room or the budget to install a full in-dash gauge.