Mercury – Command Thrust 300 Hour Maintenance Kit | FourStroke Service Pack | Precision Marine Components | 8M0120867Mercury 8 9. 9 HP EFI Command Thrust 300 Hour Maintenance Kit FourStroke Service Pack Precision Marine Components 8M0120867 Overview Theres a certain comfort that comes from knowing your outboard is ready for whatever the day bringssmooth tides, choppy water, long drifts, or a quick run back to the dock before the weather turns. When you own a small but hardworking Mercury FourStroke, routine maintenance isnt just a box to check; its part of the