The Honda 12000-Z5K-Q00 Cylinder Assembly is a genuine OEM Cylinder Assembly built for GX240 and GX270 horizontal shaft engines. As a direct Honda OEM component, this assembly is manufactured to the same specifications as the original, ensuring correct bore dimensions, port geometry, and deck height for a proper engine rebuild. This part is confirmed for GX240 and GX270 engines — verify your engine's serial number against the fitment table before ordering, as Honda does supersede parts at production breaks.
Key Features
- OEM Bore Integrity — genuine Honda manufacture means the bore diameter, cylinder deck, and casting geometry match the original specification exactly, which is critical for piston-to-wall clearance and ring seal
- Direct-Fit Replacement — engineered to the same dimensional tolerances as the factory cylinder, this assembly drops into the engine without reworking mounting faces or deck surfaces
- GX240 and GX270 Fitment — confirmed for GX240 and GX270 horizontal shaft engines; check your serial number against the fitment table to confirm the correct assembly for your serial range
- Core Engine Performance — a worn, cracked, or scored cylinder causes compression loss, excessive oil consumption, and hard starting; replacing this assembly restores the combustion chamber integrity the engine depends on
The cylinder is the structural heart of a four-stroke engine. It houses the piston and rings, forms the walls of the combustion chamber, and provides the mounting surface for the cylinder head above and the crankcase below. As the piston travels through its bore on every power stroke, the cylinder's walls must maintain a consistent diameter and surface finish to allow the rings to seal combustion gases above while controlling oil below. When a cylinder bore becomes scored, worn oversized, or cracked — typically from low-oil operation, foreign object ingestion, or extended service without ring replacement — compression drops, oil consumption rises, and the engine loses the power needed to drive the equipment it powers. Replacing the Cylinder Assembly with a genuine Honda unit restores the tight bore tolerances and structural integrity required for full compression and long service life.
Part Details
| Part Number | 12000-Z5K-Q00 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Cylinder Assembly |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX240, GX270 | All |
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.
