Mercury - 150hp FourStroke EFI 100 Hour Maintenance Kit Maintenance Kit Standard Components 8M0094232. Overview. There's a certain kind of confidence that comes from knowing your outboard is properly cared for - the kind you feel in your hands when you ease the throttle forward and the engine responds without hesitation. Anyone who spends real time on the water knows that reliability is earned through consistent maintenance, not luck. The Mercury 150hp FourStroke EFI 100 Hour Maintenance Kit, pa