9.0L 552 CU IN V8 - 860 to 1650 QCV4

Mercury Racing QC4V Parts Lookup: 1100, 1350, 1550, & 1650 Engines

Welcome to the definitive OEM parts database for the Mercury Racing 9.0L 552 cu in V8 engine platform. While officially cataloged by displacement, this quad-cam, four-valve block is universally known in the high-performance marine industry as the QC4V family.

Whether you are servicing an 860, a twin-turbo Mercury Racing 1350, freshening up an 1100, or sourcing heavy-duty internal components for a 1550 or 1650 racing application, you will find the complete factory exploded schematics below.

• Find Your Component: Click on the proper diagram section below to access exact part numbers for turbos, cooling systems and everything else on your engine.
• Guaranteed Fitment: We source directly from Mercury Racing to ensure your high-horsepower configuration retains factory tolerances and reliability.