Genuine Mercury/Quicksilver Long Block – 4.3L V6 (2002–2007, Inboard/Sterndrive) – Part 8M0188294
OEM Remanufactured Long Block Assembly for select MerCruiser 4.3L V6 engines. Factory-spec replacement built to Mercury Marine standards for reliability, performance, and proper fit.
Includes set of new genuine V6 manifolds and risers.
Key Features
- Genuine OEM: Mercury/Quicksilver reman long block (not aftermarket)
- Engine Family: 4.3L V6 (Vortec-style), model years ~2001 and up with crank position sensor
- Configuration: Long block assembly – block, crankshaft, camshaft, pistons, rings, connecting rods, cylinder heads, timing set, and core plugs installed
- Built to Factory Specs: Correct clearances and components for marine duty
- Direct Replacement: Designed to restore OEM performance when matched to the correct serial/part specification
What’s Included
- Complete long block (short block + fully assembled cylinder heads)
- Pre-installed internal components per Mercury remanufacturing specification
Not included (transfer from your original engine as applicable): intake/exhaust manifolds, fuel system components (carb/TKS/EFI hardware), ignition, sensors, brackets, front accessories, flywheel/housing, starter, alternator, water pump(s), wiring, and ECU/PCM.
Compatibility
Suitable for select MerCruiser 4.3L V6 sterndrive/inboard applications around 2002–2007 (Alpha/Bravo setups) that specify part 8M0188294 in the Mercury Parts Catalog. Actual fit depends on serial number, induction type, balance specification, and boat setup.
Verify Before Purchase: Match this part number against your engine serial number in the Mercury Parts Catalog or confirm with your Mercury dealer to ensure correct fit for your specific model and build.
Supersession
- Replaces/Supersedes: 8M0063328
Identifiers
- Manufacturer: Mercury Marine / Quicksilver
- MPN (Part No.): 8M0188294
- Brand: Quicksilver / Mercury Marine
Installation Notes
- Professional marine installation recommended
- Set base timing and ECM/PCM calibrations as required for your model
- Prime oiling system prior to first start; follow Mercury break-in procedure
- Inspect/replace cooling, ignition, and fuel-system components as necessary
Shipping & Core
- Ships on a pallet via freight; provide a commercial address for the most efficient delivery
Why Buy Genuine?
- Built and tested to OEM marine specifications
- Correct fitment when matched by part number/serial range
- Reliable performance and longevity in harsh marine environments
Note: Always verify the compatibility of replacement parts with your specific engine model and serial number. For assistance, consult your Mercury Marine dealer or refer to the Mercury Parts Catalog.
