Upgrade your boat with the Quicksilver® Mercury® Mercruiser® 802889Q1 Crankcase Oil Drain Pump Assembly. This Quicksilver boat drain pump assembly brings industry-leading performance and reliability. Mercury-Mercruiser drain pump assembly. Industry-leading performance and reliability. NOTE: The Quicksilver Mercury Mercruiser fits all sterndrive and inboard engines with threaded fitting on the dipstick tube, and Mercury/Mariner 8/9.9 FourStroke outboards 2004 and older.