The Honda 15721-Z9L-800 Breather Tube is a genuine OEM component designed for GCV170 and GCV200 vertical shaft engines. As a direct Honda OEM part, it is manufactured to the same specification as the original, ensuring a correct, trouble-free installation. This breather tube is confirmed to fit GCV170 and GCV200 engines — verify your engine's serial number against the fitment table to confirm this is the right part for your unit before ordering.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this breather tube matches the original in geometry and material, so it seats and routes exactly as the factory part did.
- Correct Crankcase Ventilation — the tube carries blow-by vapors from the crankcase back into the air intake system; a cracked or collapsed tube allows unmetered air into the engine, upsetting the fuel-air mixture and causing rough running or hard starting.
- Fits GCV170 and GCV200 Engines — confirmed fitment for both vertical shaft engine models; check your serial number against the compatibility table to match the right supersession row.
- Serial Number Verification Recommended — Honda updates part numbers at production serial breaks, so confirming your engine's serial number ensures you receive the correct tube for your specific build.
The breather tube is part of the engine's crankcase ventilation system. As the engine runs, combustion gases — known as blow-by — pass the piston rings and enter the crankcase; the breather tube routes these vapors back to the air intake rather than venting them to atmosphere, keeping the engine clean and oil consumption in check. When the tube cracks, kinks, or deteriorates, uncontrolled air enters the intake path, leaning out the fuel mixture and often producing white smoke, oil consumption, or unstable idle on GCV170 and GCV200 engines.
Part Details
| Part Number | 15721-Z9L-800 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Breather Tube |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Vertical Shaft Engine | GCV170, GCV200 | 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.
