Genuine Mercury/Quicksilver Long Block – 4.3L V6 (1996–2001, Inboard/Sterndrive) – Part 8M0188293
OEM Remanufactured Long Block Assembly for select MerCruiser 4.3L V6 marine engines. This factory-spec replacement is built to Mercury Marine’s precise tolerances for durability, smooth operation, and correct marine performance.
Includes set of new genuine V6 manifolds and risers.
Key Features
- Genuine OEM: Mercury/Quicksilver remanufactured engine – not aftermarket
- Engine Family: 4.3L V6 (GM base) – Non-balance-shaft design for model years approximately 1996–2001
- Configuration: Complete long block assembly – block, crankshaft, pistons, rods, camshaft, timing set, and assembled cylinder heads
- Factory Specifications: Built and tested by Mercury Marine for marine operating conditions
- Direct Replacement: Designed for earlier 4.3L engines originally equipped with a 1X (4-tooth) crankshaft reluctor wheel
What’s Included
- Fully assembled long block (short block + cylinder heads installed)
- Crankshaft, camshaft, pistons, rings, rods, valves, and timing components pre-fitted to OEM spec
Not included: intake and exhaust manifolds, ignition system, flywheel housing, front cover, fuel system components (carburetor or TKS/EFI hardware), starter, alternator, water pump(s), or electrical harnesses. Reuse or replace as required from your existing engine.
Compatibility
Suitable for select MerCruiser 4.3L carbureted or early TKS (non-balance-shaft) engines built from approximately 1996 through 2001. Common in Alpha One and Bravo sterndrive installations. Matches applications originally using part 8M0188293 or its earlier equivalents.
Verify Before Purchase: Match your engine serial number in the Mercury Parts Catalog or confirm with your Mercury dealer to ensure this is the correct long block for your specific model and build year.
Reluctor / Timing Wheel
- Compatible with: 1X (4-tooth) crankshaft reluctor wheel
- Not compatible with: 58X reluctor systems (used on 2002+ balance-shaft engines – see part 8M0188294)
- Engines using a crankshaft position sensor must match the correct reluctor version
Supersession
- Replaces/Supersedes: 8M0063327, 862266R90
Identifiers
- Manufacturer: Mercury Marine / Quicksilver
- MPN (Part No.): 8M0188293
- Brand: Quicksilver / Mercury Marine
Installation Notes
- Professional marine installation recommended
- Confirm proper timing sensor type and alignment with your ignition system
- Follow Mercury Marine oil priming and break-in procedures
- Inspect and replace gaskets, hoses, and ignition components as needed
Shipping
- Ships via freight
Why Choose Genuine OEM?
- Built using factory-tested marine-grade components
- Exact fit and proper compression ratio for MerCruiser models
- Guaranteed compatibility when matched by serial number
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.
