The Honda 19104-ZG5-800 Reserve Tank Tube is a genuine OEM component designed for the GX640 horizontal shaft engine. As a direct Honda OEM part, it is manufactured to the exact specifications of the original, ensuring a correct fit with no guesswork. Confirm your engine's serial number against the fitment table before ordering to make sure this is the right tube for your unit.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this tube matches the original in dimensions and routing geometry, so it connects and seals exactly as the factory-installed component did.
- Correct Coolant Recovery Routing — a properly functioning reserve tank tube maintains the sealed path between the overflow and reserve tank; a cracked or collapsed tube compromises the cooling circuit's ability to manage coolant expansion.
- GX640 Fitment — built specifically for the GX640 horizontal shaft engine. Verify your serial number against the fitment table, as Honda updates part numbers at production breaks.
The reserve tank tube connects the engine's coolant overflow port to the reserve tank, allowing coolant to flow back and forth as the engine heats up and cools down. This keeps the cooling system operating as a closed loop, preventing coolant loss and protecting the engine from running low. A cracked, kinked, or deteriorated tube breaks that seal, leading to coolant loss and the risk of the engine running hotter than intended.
Part Details
| Part Number | 19104-ZG5-800 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Reserve Tank Tube |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX640 | 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.
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