The Honda 98066-54716 Spark Plug (DR-4HS) is a genuine OEM ignition component designed for Honda BF100, BF75, and BF8 outboard motors. As a factory-sourced part, this spark plug is held to Honda's exact specifications for heat range and electrode geometry, ensuring a direct fit without guesswork. Verify your outboard's serial number against the fitment table before ordering, as Honda updates parts at specific serial breaks.
Key Features
- OEM Ignition Specification — the DR-4HS designation specifies an exact heat range engineered for Honda's outboard combustion chambers, delivering consistent spark energy under marine operating conditions
- Direct OEM Replacement — sourced directly from Honda, part number 98066-54716 installs into the cylinder head the same way the original did, with no re-gapping or adaptation
- Confirmed Marine Fitment — listed for BF100, BF75, and BF8 outboard motors; always cross-reference your serial number with the fitment table to confirm the correct plug for your engine's production run
- Consistent Ignition, Cleaner Combustion — a spark plug in good condition fires the air-fuel charge completely and on time; a worn or fouled plug causes hard starting, rough running, and increased fuel consumption on the water
A spark plug is the final link in the ignition system: it receives high-voltage current from the ignition coil and fires a spark across its electrode gap to ignite the compressed air-fuel mixture in the cylinder. In a marine outboard environment, the plug is exposed to sustained load cycles, moisture, and salt air, which accelerate electrode wear and deposit buildup. When a spark plug degrades, the engine may misfire, idle roughly, lose power, or become difficult to start — replacing it at regular service intervals keeps combustion efficient and the outboard running at full output.
Part Details
| Part Number | 98066-54716 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Spark Plug (DR-4HS) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Outboard Motor | BF75 | All |
| Portable Outboard Motor | BF8, BF100 | 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.
