The Honda 13010-ZH7-004 Piston Ring Set (STD) is a genuine OEM standard-bore replacement designed for GX120 horizontal shaft engines, GXV120 vertical shaft engines, and a wide range of Honda-powered equipment including the BF5 portable outboard motor, EG1400, EG2200, EG2500, EZ1400, and EZ2500 generators, WB20, WB30, WD20, WD30, WH15, WH20, WP20, and WP30 water pumps, F401 and F501 tillers, the HP400 power carrier, and more. As a genuine Honda part, this ring set is manufactured to the same specifications as the original, ensuring a correct bore fit without the guesswork of aftermarket alternatives. Confirm part number 13010-ZH7-004 against your machine's serial number and model before ordering, as Honda updates parts at specific serial breaks.
Key Features
- Genuine OEM Bore Sealing — manufactured to Honda's original compression and oil-control specifications, maintaining the cylinder pressure and oil film management the engine was designed around
- Standard Bore Fit — this is the STD (standard) variant, intended for engines running a stock bore diameter; verify your cylinder has not been bored oversize before selecting this set
- Broad Honda Fitment — covers GX120 and GXV120 engines as well as the BF5 outboard, multiple generator and water pump models, F401 and F501 tillers, and the HP400 power carrier, including both horizontal and vertical shaft applications
- Serial Number Verification Advised — Honda supersedes ring sets at production serial breaks; check your unit's serial number against the fitment table to confirm this set is correct for your specific machine
- Compression Restoration — worn or broken piston rings allow combustion gases to blow past the piston, causing loss of power, increased oil consumption, and hard starting; a fresh ring set restores the seal that keeps the engine running at full output
Piston rings seal the gap between the piston and the cylinder wall, performing two critical jobs: holding combustion pressure above the piston so the engine produces full power, and scraping excess oil back down the cylinder bore to prevent it from burning in the combustion chamber. A standard piston ring set typically includes compression rings to maintain cylinder pressure and an oil control ring to regulate lubrication. When rings wear, lose tension, or break, compression drops, oil consumption climbs, and the engine may produce blue exhaust smoke or struggle to start. Replacing the ring set at the correct service interval — or during a top-end rebuild — restores the cylinder seal and brings engine performance back to specification.
Part Details
| Part Number | 13010-ZH7-004 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Piston Ring Set (STD) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EG1400, EG2200, EG2500, EZ1400, EZ2500 | 3993726-9999999 |
| Horizontal Shaft Engine | GX120 | All |
| Portable Outboard Motor | BF5 | All |
| Power Carrier | HP400 | All |
| Tiller | F401, F501 | 3284617-9999999 |
| Vertical Shaft Engine | GXV120 | 2554751-9999999 |
| Water Pump | WB20, WB30, WD20, WD30, WH15, WH20, WP20, WP30 | 3284617-9999999 |
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.
