The Honda 19102-PA0-020 Reserve Tank Cap is a genuine OEM Reserve Tank Cap designed for a wide range of Honda engines, generators, and tractors, including GX360 and GX640 horizontal shaft engines, EB12, EL5000, ES6500, and EX5500 generators, H4514, H4518, HT3813, and HT4213 lawn tractors, the H5518 multi-purpose tractor, and the H6522 compact tractor. As a genuine Honda OEM component, this cap is manufactured to the same standard as the original part fitted at the factory. Because this cap appears across multiple equipment classes and model lines, buyers should verify their machine's model and serial number against the fitment table before ordering to confirm this is the correct cap for their unit.
Key Features
- Genuine Honda OEM Construction — manufactured to Honda's own specification, ensuring the cap seats and seals the reserve tank exactly as the original did
- Broad Cross-Platform Fitment — covers GX360 and GX640 horizontal shaft engines, multiple Honda generator models, and H-series and HT-series tractors within a single part number
- Serial Number Verification Recommended — Honda supersedes parts at production breaks across this many product lines, so confirm your machine's serial number against the fitment table before ordering
- Direct Drop-In Replacement — replaces the original cap with no alteration needed, restoring the reserve tank to proper operating condition
The reserve tank cap seals the coolant or fluid overflow reservoir, keeping the tank closed against contaminants, debris, and evaporation while allowing pressure to equalize as the system heats and cools. A properly sealing cap maintains the fluid level in the reserve tank and prevents unwanted loss between service intervals. When this cap cracks, warps, or no longer seats correctly, the tank can lose fluid, introduce contamination, or fail to draw fluid back into the system as temperatures drop — leading to low fluid levels and potential overheating or cooling system imbalance in the equipment it serves.
Part Details
| Part Number | 19102-PA0-020 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Reserve Tank Cap |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Compact Tractor | H6522 | All |
| Generator | EB12, EL5000, ES6500, EX5500 | All |
| Horizontal Shaft Engine | GX360, GX640 | All |
| Lawn Tractor | H4514, H4518, HT3813, HT4213 | All |
| Multi-Purpose Tractor | H5518 | 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.
