Mercury – Service Monitor | Engine Hour & Warning Indicator | 79-8M0050399 Yamaha-F9-9--6G8-Models-2005 Meets all outboard and personal

Meets all outboard and personal watercraft manufacturers' recommendations for use of TC-W2 and TC-W3 oils in pre-mix or oil-injected 2-cycle applications

The cast iron has a weight that speaks to durability

Maintains proper engine temperature for consistent performance

Universal mounting pattern: 5" x 12"

Mercury – Service Monitor | Engine Hour & Warning Indicator | 79-8M0050399 Yamaha-F9-9--6G8-Models-2005 Meets all outboard and personalMercury Service Monitor Engine Hour & Warning Indicator 79 8M0050399 OverviewThis Service Monitor is a simple way to keep track of engine hours and maintenance intervals on most Mercury outboards and gasoline MCM MIE engines. It replaces older versions with a universal style unit that installs cleanly and works the same across a wide range of setups. On the water, it gives you a quick way to monitor run time so you can stay on top of routine service.