Honda 16970-Z2E-003 Auto Petcock Assembly

The Honda 16970-Z2E-003 Auto Petcock Assembly is a genuine OEM component designed for GX440 horizontal shaft engines. As a factory-original part, it is built to the same specifications as the unit it replaces, ensuring a direct, trouble-free installation with no adaptation required. This assembly is the correct replacement for GX440 engines and carries Honda's OEM part number 16970-Z2E-003 for straightforward verification against your existing petcock. Confirm your engine's serial number against the fitment table before ordering, as Honda supersedes parts at production breaks.

Key Features

• Genuine OEM Fuel Control — factory-original construction ensures the valve opens and closes at the correct vacuum threshold, delivering consistent fuel flow when the engine is running and shutting it off at rest
• Direct OEM Replacement — part number 16970-Z2E-003 replaces the original assembly with no modification, preserving correct fuel line routing and connection points on GX440 engines
• GX440 Fitment — sourced specifically for the GX440 horizontal shaft engine; verify your serial number against the fitment table to confirm this is the correct variant for your production run
• Prevents Fuel System Issues — a worn or failing petcock can cause fuel starvation under load, hard starting, or uncontrolled fuel flow; a functioning assembly keeps the fuel circuit operating as designed

An auto petcock is a vacuum-operated fuel shutoff valve that controls fuel flow from the tank to the carburetor. Unlike a manual petcock, it uses engine vacuum drawn during operation to open the valve, allowing fuel to flow only when the engine is running — when vacuum drops at shutdown, the valve closes automatically. This arrangement prevents raw fuel from reaching the carburetor when the engine is off, protecting against flooding and carburetor damage. When the diaphragm or seat inside the assembly wears or cracks, the engine may run lean, stall under load, or allow fuel to seep through when it should be shut off.

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.