The Honda 98079-54841 Spark Plug (BP4ES) is a genuine OEM ignition component designed for GX120 and GX160 horizontal shaft engines, as well as HR194, HR195, HR214, HR215, HR216, HRA214, HRA215, HRA216, HRC215, and HRC216 lawn mowers. As a direct Honda OEM part, it is manufactured to the same specification as the plug your machine left the factory with, ensuring correct heat range, gap, and thread pitch right out of the box. Verify your machine's model and serial number against the fitment table before ordering, as Honda supersedes spark plug specs at production breaks and the BP4ES designation identifies this specific variant.
Key Features
- Correct Heat Range for This Application — the BP4ES designation specifies an exact heat range engineered for the combustion chamber temperatures of these Honda engines and mowers; the wrong heat range causes fouling or pre-ignition
- Genuine Honda OEM Part — sourced directly from Honda, this plug carries the same electrode geometry, gap, and thread specification as the original, so it drops in without adjustment
- Broad Honda Fitment — listed for GX120 and GX160 horizontal shaft engines as well as HR, HRA, and HRC series walk-behind lawn mowers, including HR194 through HRC216
- Check Your Serial Number — Honda updates ignition specifications at production breaks; confirm your machine's serial number against the fitment table to ensure this is the correct plug for your unit
- Ignition Performance — a worn or fouled spark plug produces a weak or inconsistent spark, leading to hard starting, rough running, and increased fuel consumption; a fresh OEM plug restores crisp ignition and smooth power delivery
A spark plug delivers the high-voltage electrical spark that ignites the air-fuel mixture inside the combustion chamber, triggering the power stroke that keeps the engine running. The heat range of the plug — encoded in the BP4ES designation — determines how quickly the electrode tip sheds heat, keeping it hot enough to burn off deposits but cool enough to prevent pre-ignition. When a spark plug wears out, the electrode gap widens, the ceramic insulator can crack, and spark energy drops, resulting in misfires, difficult cold starts, and sluggish throttle response across the engines and mowers this part serves.
Part Details
| Part Number | 98079-54841 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Spark Plug (BP4ES) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX120 | 1000001-3235089 |
| Horizontal Shaft Engine | GX160 | 1000001-5249928 |
| Lawn Mower | HR194, HR195, HR214, HR215, HR216, HRA214, HRA215, HRA216, HRC215, HRC216 | 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.
