The Honda 18310-ZL9-000 Muffler is a genuine OEM replacement built for GC135 and GC160 horizontal shaft engines, FG400 and FG500 tillers, and WN20 and WN30 water pumps. As a direct Honda OEM component, this muffler is manufactured to the same specifications as the part it replaces, ensuring a correct fit without modification. Honda supersedes parts at serial breaks, so confirm your unit's serial number against the fitment table before ordering to make sure part number 18310-ZL9-000 is the right one for your machine.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this muffler matches the original in geometry and exhaust outlet sizing for a drop-in installation.
- Broad Fitment — covers GC135 and GC160 horizontal shaft engines, FG400 and FG500 tillers, and WN20 and WN30 water pumps, including a range of serial-number configurations.
- Serial Number Verification Recommended — Honda updates exhaust components at production breaks; always cross-reference your machine's serial number with the fitment table to confirm this is the correct muffler for your unit.
- Exhaust Flow Integrity — a correctly functioning muffler keeps exhaust gases directed away from the operator and allows the engine to maintain its designed back-pressure, preserving power output and fuel efficiency.
The muffler is the final stage of the engine's exhaust system, channeling hot combustion gases away from the engine and reducing the acoustic signature of each exhaust pulse. It works by routing gases through an internal chamber or series of baffles that dissipate pressure and dampen sound before the exhaust exits the unit. When a muffler cracks, corrodes through, or becomes blocked, the engine may run rough, lose power, or produce excessive noise — and exhaust gases can be directed where they do not belong. Replacing a worn muffler with a genuine Honda part restores proper exhaust routing and keeps the engine running as intended across GC-series engines, FG-series tillers, and WN-series water pumps.
Part Details
| Part Number | 18310-ZL9-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Muffler |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GC135, GC160 | All |
| Tiller | FG400, FG500 | All |
| Water Pump | WN20, WN30 | 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.
