Mercury F8AZ-6600-AA Pump Assembly - Oil

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The oil pump is available as a complete replacement unit only. No service parts or repair specifications are available from the manufacturer. Unbolt and lower the oil pan. It's not necessary to completely remove the oil pan. Remove the two bolts that attach the oil pump pick-up tube to the oil pump. Remove the timing cover, timing chains, chain guides and crankshaft sprockets. Remove the four oil pump mounting bolts and separate the pump from the block. Prime the oil pump prior to installation. Pour clean oil into the pick-up port and turn the pump by hand. Inspect the 0-ring gasket on the pick-up tube, if damaged replace it. Install the oil pump to the engine and tighten the bolts to the torque. The remainder of installation is the reverse of removal procedure. Fill the engine with the correct type and quantity of oil. Start the engine and check for leaks.

Unbolt and lower the oil pan. Remove the oil pick-up tube-to-main bearing cap nut. Remove the oil pump pick-up tube mounting bolts. Remove the oil pump mounting bolts and lower the oil pump assembly into the oil pan and lift them both out together. If the pump is faulty, or you suspect that it's faulty, install a new one - do not attempt to repair the original. As complete oil pumps, new or remanufactured, have become more inexpensive, reliable and readily available, service parts for oil pump overhaul/repair have become increasingly difficult and unnecessary to find. Prime the oil pump prior to installation. Pour clean oil into the pick-up and turn the pump shaft by hand. If you separated the pump from the pick-up tube, use a new gasket and tighten the bolts securely when reattaching them. As the pump is reinstalled, fit the oil pump driveshaft into the pump. It must seat all the way. DO NOT try to force it. If it doesn't align, turn the pump slightly and try again. Install the mounting bolts/nut and tighten them.