The Honda 14721-Z7E-000 Exhaust Valve is a genuine OEM component designed for GX390 horizontal shaft engines. As a direct Honda OEM part, it is manufactured to the exact specifications required for proper sealing and reliable combustion in the GX390. Confirm fitment against the serial number on your engine before ordering, as Honda supersedes parts at production breaks to ensure the correct valve is supplied for your unit.
Key Features
- Genuine Honda OEM Part — sourced directly from Honda, this exhaust valve meets the exact dimensional and metallurgical requirements Honda specifies for the GX390 engine, ensuring proper face geometry and stem tolerance for correct valve-to-seat contact.
- Direct OEM Replacement — this valve is a drop-in replacement for the GX390, requiring no modification to the valve train, guide, or seat during a standard valve service.
- GX390 Fitment — built specifically for GX390 horizontal shaft engines; verify your engine serial number against the fitment table to confirm the correct part for your serial range.
- Combustion Sealing — a properly functioning exhaust valve closes cleanly against its seat to seal the combustion chamber during compression and power strokes, maintaining compression pressure and engine output. A worn or burned valve allows combustion gases to escape, resulting in loss of power and difficult starting.
The exhaust valve controls the release of spent combustion gases from the cylinder at the end of the power stroke. It opens on the exhaust stroke to allow burned gases to exit the combustion chamber, then closes tightly against its seat to seal the chamber for the next compression cycle. When an exhaust valve wears, burns, or fails to seat correctly, compression drops, the engine loses power, runs rough, and may become difficult or impossible to start — making timely replacement essential to keeping the GX390 running at full capacity.
Part Details
| Part Number | 14721-Z7E-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Exhaust Valve |
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.
