The Honda 12000-ZF6-418 Cylinder Assembly (Self Starter+Alert) is a genuine OEM component designed for GX390 horizontal shaft engines. This assembly is the factory-correct replacement for GX390 engines equipped with an electric self-starter and oil alert system, ensuring every interface, bore dimension, and mounting point matches Honda's original specification. Confirm your engine's serial number against the fitment table before ordering, as Honda supersedes cylinder assemblies at defined serial breaks within the GX390 line.
Key Features
- Genuine OEM Cylinder Bore Integrity — sourced directly from Honda, this assembly carries the correct bore geometry and surface finish critical to proper ring seal, compression retention, and long-term engine performance on GX390 engines
- Self-Starter and Oil Alert Configuration — this specific variant is machined and pre-drilled for GX390 engines fitted with an electric starter and Honda's oil alert system; it is not interchangeable with the non-starter or non-alert variants
- Direct OEM Replacement — installs using Honda's original mounting points and hardware patterns, keeping teardown and reassembly straightforward for technicians already familiar with the GX390 platform
- Serial Number Verification Recommended — Honda issues cylinder assemblies across serial ranges within the GX390 family; check your engine's serial number against the compatibility table to confirm part number 12000-ZF6-418 is correct for your unit
The cylinder assembly is the structural core of the engine — it houses the piston, connecting rod, and crankshaft, and its bore surface is what the piston rings seal against to maintain compression and control oil consumption. On a GX390 equipped with a self-starter and oil alert, the cylinder also carries the threaded ports, passages, and mounting provisions that those systems depend on. When a cylinder is worn beyond service limits, cracked, or damaged, the engine loses compression, burns oil, and cannot be restored by rings or gaskets alone — the cylinder itself must be replaced to bring the engine back to a serviceable condition.
Part Details
| Part Number | 12000-ZF6-418 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Cylinder Assembly (Self Starter+Alert) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX390 | 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.
