A Series 5500 CruiseMaster Fuel Monitoring System will increase any boat's effective range by accurately recording total fuel consumed by pinpointing optimum speed. Now you can spend more time fishing or cruising knowing you have enough fuel to make it to port. CruiseMaster brings you more than peace of mind and increased cruising range, it also pays for itself in better fuel economy. Fits virtually all inboard, I/O, and gas outboard engines.