The Honda 15721-891-020 Breather Tube is a genuine OEM component designed for the GV400 vertical shaft engine. As a direct Honda OEM part, it is manufactured to the same specification as the original, ensuring a correct, hassle-free installation. Confirm your engine's serial number against the fitment table before ordering to ensure this is the right breather tube for your unit.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this breather tube meets the exact dimensional and material requirements of the original, keeping crankcase ventilation operating as intended on the GV400 engine.
- Correct Routing and Connection — engineered to match the original routing path and connection points of the GV400 breather system, so installation requires no cutting, adapting, or improvisation.
- Serial Number Verification Recommended — Honda updates parts at production breaks, so always cross-check your engine's serial number against the compatibility table to confirm this is the correct tube for your specific unit.
The breather tube is part of the crankcase ventilation system on the GV400 vertical shaft engine. Its job is to route blow-by gases — pressure that escapes past the piston rings during combustion — out of the crankcase and back into the air intake to be burned off, preventing pressure buildup that can force oil past seals and cause leaks. When the breather tube cracks, collapses, or becomes blocked, crankcase pressure rises unchecked, leading to oil leaks, increased oil consumption, and potential seal damage that can shorten engine life.
Part Details
| Part Number | 15721-891-020 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Breather Tube |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Vertical Shaft Engine | GV400 | 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.
