DRIP GUARD-OIL This is a genuine Mercury Marine factory OEM part, not aftermarket. It is for used on Mercury F25hp and F30hp 4-stroke outboards and Mercury F40-F60 4-stroke outboards. Makes oil changes easier and less messy. After the oil reservoir has been properly drained, this plastic tray can be put in place to help prevent any remaining oil from dripping into the lower cowl as you remove the side mounted engine oil filter.