The Honda 16539-ZF5-L40 Screw Adjust Guard Plate is a genuine OEM component designed for GXV340 and GXV390 vertical shaft engines. As a direct Honda OEM part, it is manufactured to the same specification as the original, ensuring a correct, trouble-free installation. Honda supersedes parts at serial breaks, so confirm your engine's serial number against the fitment table before ordering to make sure part number 16539-ZF5-L40 is the right match for your unit.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this plate matches the original part in every dimension and configuration, with no guesswork on fit.
- Correct Adjustment Protection — guards the screw adjust mechanism against interference and displacement, helping the adjustment hold its setting under normal engine operation.
- Vertical Shaft Engine Fitment — built specifically for GXV340 and GXV390 vertical shaft engines; confirm your serial number against the fitment table, as Honda releases updated part numbers at serial breaks.
The Screw Adjust Guard Plate is a protective plate that shields the adjustment screw assembly on GXV340 and GXV390 vertical shaft engines, preventing unintended contact or movement that could disturb the calibrated setting. Keeping this plate in good condition is important because a damaged or missing guard can allow the adjustment to shift, leading to inconsistent engine behavior. Replacing a worn or broken plate restores the protection the adjustment assembly relies on to maintain its correct position during operation.
Part Details
| Part Number | 16539-ZF5-L40 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Screw Adjust Guard Plate |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Vertical Shaft Engine | GXV340, GXV390 | 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.
