Multiquip 12000Z4M406 Cylinder Barrel Assembly (Oil Alert) GX160U

The Multiquip 12000Z4M406 is a genuine OEM Cylinder Barrel Assembly (Oil Alert) GX160U designed for GA2.5HR, GAC2.5HR, MVC88VTH, and MVC88VTHW series equipment. This assembly is sourced directly from Multiquip and carries the exact specifications required for the GX160U engine platform used across both gasoline-powered generator and plate compactor applications. Verified fitment against models GA2.5HR, GAC2.5HR, MVC88VTH, and MVC88VTHW means you can order with confidence. Part number 12000Z4M406 is the correct OEM reference — confirm it against your model and serial tag before ordering.

Key Features

• Genuine OEM Cylinder Bore Integrity — Manufactured to the exact bore dimensions and surface finish specifications of the original GX160U cylinder, ensuring correct piston-to-wall clearance and proper compression.
• Integrated Oil Alert System — Includes the Oil Alert port and sensor interface built into the barrel assembly, preserving the low-oil shutdown protection function critical to engine longevity.
• Direct-Fit GX160U Replacement — Engineered as a drop-in assembly for the Honda GX160U engine configuration, aligning with existing head, crankcase, and piston components without machining or adaptation.
• Confirmed Fitment — Verified for GA2.5HR, GAC2.5HR, MVC88VTH, and MVC88VTHW equipment, covering both generator and plate compactor applications built around the GX160U engine.
• Engine Rebuild Foundation — When replacing a scored, worn, or cracked barrel, starting with an OEM assembly ensures the rest of the rebuild — rings, piston, head gasket — seats correctly and holds compression from the first start.
• Oil Alert Protection Preserved — Restoring the original barrel assembly keeps the Oil Alert shutdown circuit fully operational, protecting the engine from low-oil damage during extended compaction or generation cycles.

The cylinder barrel is the core structural and mechanical housing of the engine — it is the bore in which the piston travels to generate compression and power. On GX160U-equipped machines, the barrel also incorporates the Oil Alert sensor port, which feeds the low-oil warning and automatic shutdown system. A worn, scored, or cracked barrel causes compression loss, excessive oil consumption, and overheating, and a compromised Oil Alert port can disable the engine's built-in protection against low-oil damage. Replacing the barrel assembly with a genuine OEM part restores correct compression, proper oil control, and full Oil Alert functionality in a single service operation.

DHS Equipment supplies genuine Multiquip OEM parts with part number accuracy you can rely on. If you need help confirming fitment for your specific unit, contact our parts team before ordering.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.