888771T Mercruiser Intake Manifold (Lower) V6 MPI | Genuine Used Part

🔧 Product Description

Genuine MerCruiser 4.3L V6 MPI Lower Intake Manifold - Part Number: 888771T

A genuine used lower intake manifold for GM-based MerCruiser 4.3L / 262 CID V6 MPI engines.

The lower manifold bolts to the Vortec cylinder heads and supports the upper plenum, six fuel injectors, fuel rail and manifold pressure/temperature sensor components. Original 888771T is obsolete and has been replaced by later Mercury service manifolds including 8M0114514 and 8M0176491.

⚙️ Key Features

• Genuine Mercury MerCruiser lower MPI manifold
• Correct original part number 888771T
• Used on 4.3L / 262 CID V6 MPI engines
• Supports six injectors and the upper plenum
• Obsolete original component with later Mercury replacements

🚤 Compatibility

Commonly used on

• MerCruiser 4.3L MPI Alpha engines
• MerCruiser 4.3L MPI Bravo engines
• MerCruiser 4.3L MPI EC applications
• GM 262 CID V6 Vortec marine engines using the two-piece MPI intake

Typically suits

• Engine models:
• MerCruiser 4.3L MPI Alpha / Bravo
• Serial 0M300000 through 0M614999
• Serial 0M615000 through 0W309999
• Serial 0W310000 through 0W649999
• Serial 0W650000 through 0W658582
• Serial 0W658584 through 1A030367
• Serial 1A030370 through 1A063239
• Engine Size: 4.3L / 262 CID V6
• Fuel System: Multi-point electronic fuel injection
• Year Range: Approximately early 2000s - late 2000s
• Fitment Requirement: Confirm serial number, upper plenum and fuel-rail arrangement

🔌 Function

The lower manifold distributes intake air to the six cylinder-head ports and supports the injectors and upper plenum.

⚠️ Common Signs of Failure

• Vacuum leak
• Internal coolant leakage
• Damaged injector bores
• Cracked or corroded manifold
• Lean-running or misfire faults from air leakage

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 8M0176491 later Mercury equivalent and service reference
• 8M0114514 documented replacement for 888771T on later parts diagrams
• 888771T original lower intake manifold

OEM / Related Numbers

• 888771T
• 8M0114514
• 8M0176491
• 888773T matching upper intake manifold
• 27-888774 related upper-manifold gasket
• 888775T related fuel-rail assembly
• 885176 related fuel injector
• Sierra 18-7688 aftermarket injector equivalent to 885176
• 48358 related pipe plug
• 8243261 / 824326002 related lower intake gasket set
• 885165 / 8M0087834 related manifold pressure and temperature sensor

Aftermarket / Verified Equivalents

• No verified complete aftermarket lower-manifold casting
• Genuine Mercury 8M0114514 or 8M0176491 replacement
• Used genuine 888771T manifolds
• Aftermarket injectors, sensors and gasket sets are available separately
• Confirm serial range and upper-manifold design before interchange

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated