885164001 8M0097032 Mercruiser 3858959 Volvo Lower Intake Manifold | Genuine Used Part

🔧 Product Description

Genuine MerCruiser / Volvo Penta Gen III MPI Lower Intake Manifold - Part Numbers: 885164001 / 8M0097032 / 3858959

A genuine used lower intake manifold for GM-based 5.0L, 5.7L and 6.2L Vortec MPI marine engines.

The cast lower manifold bolts to the cylinder heads and supports the upper plenum, injectors, fuel rail and manifold pressure/temperature sensor system. Mercury 885164001 was replaced through 8M0084207 to current service number 8M0097032. Volvo Penta uses related lower inlet-pipe number 3858959.

⚙️ Key Features

• Genuine MerCruiser Gen III MPI lower intake manifold
• Original part number 885164001
• Current replacement 8M0097032
• Volvo Penta cross-reference 3858959
• Used on 5.0L, 5.7L and 6.2L GM Vortec MPI engines

🚤 Compatibility

Commonly used on

• MerCruiser 5.0 MPI engines
• MerCruiser 350 MAG / 5.7L MPI engines
• MerCruiser 6.2L MPI and Horizon engines
• MerCruiser TowSports and Ski MPI engines
• Volvo Penta 5.0GXi, 5.7Gi, 5.7GXi and related MPI engines
• Indmar and Marine Power GM Vortec MPI applications

Typically suits

• Engine models:
• MerCruiser 5.0L MPI
• MerCruiser 5.7L / 350 MAG MPI
• MerCruiser 5.7L MPI TowSport / Ski
• MerCruiser 6.2L MPI MIE
• MerCruiser 6.2L MPI Horizon
• Volvo Penta 5.0GXi / 5.0OSi
• Volvo Penta 5.7Gi / 5.7GXi / 5.7OSi
• Other GM Vortec MPI engines using the Gen III two-piece intake
• Engine Size: 5.0L, 5.7L and 6.2L V8
• Year Range: Approximately 1997 onward
• Fitment Requirement: Confirm 15mm injector bores, upper plenum, fuel rail and sensor arrangement

🔌 Function

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

⚠️ Common Signs of Failure

• Vacuum or boost-style intake leak
• Internal coolant leakage
• Corroded water passages
• Injector bores damaged or leaking
• Cracked or warped mounting surfaces

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 8M0097032 → Supersedes 8M0084207
• 8M0084207 → Supersedes 885164001
• 885164001 original 15mm injector-bore lower manifold

OEM / Related Numbers

• 885164001
• 8M0084207
• 8M0097032
• Volvo Penta: 3858959
• Volvo Penta: 21141685 related lower intake reference
• 8M0083536 related design or service reference on selected applications
• 885167 / 8M0097033 matching upper manifold
• 27-807473A1 related lower intake gasket set
• 885165 / 8M0087834 related manifold air pressure and temperature sensor
• Injector Bore I.D.: 15mm on the original Design II manifold

Aftermarket / Verified Equivalents

• Marine Engines 4 Less lower MPI manifold for 8M0097032
• Aftermarket cast-iron lower manifolds are sold for MerCruiser, Volvo Penta, Indmar and Marine Power 5.0L-6.2L MPI applications
• Michigan Motorz replacement lower intake manifold
• Confirm injector bore size, sensor ports, fuel-rail design and upper-manifold gasket before purchase

📦 Condition

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