The Honda 15721-ZM1-000 is a genuine OEM Breather Tube designed for the GCV135 vertical shaft engine. As a direct Honda OEM component, this tube is produced to the exact dimensions and material tolerances Honda specifies, ensuring a proper seal and correct crankcase pressure routing. Verify your engine's serial number against the fitment table before ordering, as Honda supersedes parts at specific serial breaks and this tube is confirmed for the GCV135.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this tube meets the exact dimensional and material specifications required for proper crankcase ventilation on the GCV135 vertical shaft engine.
- Correct Routing and Seal — molded to match the original routing path, this part connects and seats the way the original did, eliminating the guesswork of a non-OEM fit.
- Serial Number Verification Recommended — Honda revises parts at serial break points, so confirm your GCV135 serial number against the fitment table to ensure this is the correct breather tube for your unit.
- Crankcase Pressure Control — a failed or cracked breather tube allows unmetered air into the crankcase ventilation circuit, leading to oil consumption issues and rough running; replacing it restores proper engine behavior.
The breather tube is part of the engine's crankcase ventilation system. It channels blow-by gases from the crankcase back into the intake, preventing pressure buildup that would otherwise push oil past seals and cause consumption or leaks. On the GCV135 vertical shaft engine, keeping this tube intact and properly routed is essential to clean, oil-free operation — a cracked, hardened, or disconnected tube disrupts that balance and can cause persistent oil burning or contamination of the air cleaner.
Part Details
| Part Number | 15721-ZM1-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Breather Tube |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Vertical Shaft Engine | GCV135 | 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.
