The Honda 31750-Z0A-811 Regulator Rectifier Assembly is a genuine OEM component designed for GCV520, GCV530, GX340, GX390, GXV520, and GXV530 engines. As a direct Honda OEM replacement, this assembly is manufactured to the same specification as the original unit, ensuring correct voltage regulation and charge output on every equipped engine. Confirm your engine's serial number against the fitment table before ordering, as Honda updates charging system components at serial breaks across these engine families.
Key Features
- Genuine OEM Charging Accuracy — manufactured by Honda to deliver precise voltage regulation and rectification, maintaining the correct charge rate the electrical system on these engines depends on
- Direct OEM Replacement — matches the original unit's connector, mounting configuration, and output spec, dropping in without modification to restore proper charging system operation
- Broad Engine Fitment — covers GCV520, GCV530, GXV520, and GXV530 vertical shaft engines as well as GX340 and GX390 horizontal shaft engines; always verify by serial number using the fitment table
- Protects Downstream Electrical Components — a failed regulator rectifier can overcharge or undercharge the battery and damage connected electrical accessories; replacing a suspect unit promptly protects the rest of the charging circuit
The Regulator Rectifier Assembly performs two jobs in a single unit. The rectifier converts the alternating current produced by the engine's charging coil into direct current usable by the battery and electrical system. The regulator portion then controls that output voltage, preventing overcharging that would damage the battery or connected accessories. When this assembly fails, the battery may not charge, may overcharge, or the engine's electrical system may behave erratically — all signs the unit needs replacement.
Part Details
| Part Number | 31750-Z0A-811 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Regulator Rectifier Assembly |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX340, GX390 | All |
| Vertical Shaft Engine | GCV520, GCV530, GXV520, GXV530 | 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.
