The Honda 90486-028-000 Spark Advancer Setting Washer is a genuine OEM component designed for HR21, HRM21, and HRS21 lawn mowers. Sourced directly from Honda, this part meets the exact specifications Honda established for these mowers. Check your mower's serial number against the fitment table to confirm this is the correct listing for your unit before ordering.
Key Features
- Genuine OEM Sourcing — supplied directly by Honda, ensuring the correct geometry and dimensional tolerances for the spark advancer assembly in these mowers
- Direct Replacement — engineered to install into HR21, HRM21, and HRS21 lawn mowers without modification, restoring the spark advancer to its original operating condition
- Serial Number Verification Recommended — Honda updates parts at serial number breaks, so confirm your mower's serial number against the fitment table to ensure this is the right washer for your unit
The Spark Advancer Setting Washer is a precision washer used within the spark advance mechanism of the mower's ignition system. It controls the positional relationship of the advancer components, ensuring the ignition timing advances correctly across different engine speeds. When this washer is worn, missing, or incorrect, timing accuracy is compromised, which can lead to hard starting, rough running, or reduced power output from the mower.
Part Details
| Part Number | 90486-028-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Spark Advancer Setting Washer |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Lawn Mower | HR21, HRM21, HRS21 | 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.
