The Honda 18310-887-020 Muffler is a genuine OEM replacement designed for G150 horizontal shaft engines and WA20, WB20, and WB30 water pumps. As a direct OEM replacement, this muffler delivers the correct exhaust routing and backpressure characteristics Honda engineered into these machines. Confirm your model and serial number against the fitment table before ordering — Honda supersedes parts at production breaks, and verifying part number 18310-887-020 against your unit ensures the right muffler goes on the first time.
Key Features
- Genuine OEM Exhaust Integrity — sourced directly from Honda, this muffler meets the exact exhaust backpressure and flow requirements the G150 engine and these water pumps were designed around, protecting output and efficiency
- Direct OEM Replacement — engineered to swap in without modification, matching the original mounting points and outlet geometry for a clean installation
- Broad Fitment — covers G150 horizontal shaft engines and WA20, WB20, and WB30 water pumps; check your serial number against the fitment table to confirm the correct application for your unit
- Restored Exhaust Performance — a cracked or corroded muffler causes excessive noise, reduced engine efficiency, and dangerous exhaust leaks near the operator; this replacement restores safe, quiet operation
The muffler directs hot exhaust gases away from the engine and reduces the acoustic pulse created by each combustion cycle into an acceptable noise level. On water pump applications, it also keeps exhaust heat and fumes directed away from the operator and surrounding equipment during extended pumping runs. When a muffler cracks, corrodes through, or loses its baffling, the result is a sharp increase in exhaust noise, a drop in engine efficiency from disrupted backpressure, and the risk of hot gases escaping near fuel lines or the operator — making timely replacement essential.
Part Details
| Part Number | 18310-887-020 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Muffler |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | G150 | All |
| Water Pump | WA20, WB20, WB30 | 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.
