The Honda 19501-ZA0-800 Upper Water Hose is a genuine OEM replacement designed for ES6500 and EX5500 generators and the GX360 horizontal shaft engine. As a direct Honda OEM component, this hose is manufactured to the same standards as the original, ensuring a proper connection within the engine's liquid cooling circuit. Verify your unit's serial number against the fitment table before ordering, as Honda periodically updates cooling system components at production serial breaks.
Key Features
- Genuine Honda OEM Construction — manufactured to the same specification as the original, maintaining correct flow path geometry and connection sizing for the cooling circuit on these models
- Exact-Fit Replacement — engineered as a direct drop-in for ES6500 and EX5500 generators and GX360 engines under part number 19501-ZA0-800, with no cutting or adaptation needed
- Cooling System Integrity — a cracked, swollen, or leaking upper water hose compromises coolant flow to the engine, leading to overheating and potential engine damage; replacing it restores proper thermal management
- Serial Number Verification Recommended — Honda supersedes cooling components at production breaks, so confirm your machine's serial number against the fitment data to ensure this is the correct hose for your unit
The upper water hose carries coolant between the engine's cooling passages and the radiator or cooling system components, forming the upper leg of the liquid cooling circuit. It maintains a continuous flow of coolant to carry heat away from the engine during operation, keeping internal temperatures within a safe working range. When the hose deteriorates — through cracking, swelling, or collar fatigue — coolant flow is reduced or lost entirely, causing the engine to overheat and risking serious internal damage.
Part Details
| Part Number | 19501-ZA0-800 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Upper Water Hose |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | ES6500, EX5500 | All |
| Horizontal Shaft Engine | GX360 | 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.
