The Honda 90503-MAH-000 Engine Mounting Collar is a genuine OEM component designed for GX610 and GX620 horizontal shaft engines. As a direct Honda OEM part, it is manufactured to the same specifications as the original, ensuring a proper fit without modification. This collar is built for the large-displacement GX610 and GX620 engines, so confirm your model and serial number against the fitment table before ordering. Honda supersedes parts at serial breaks, and verifying your serial number is the surest way to confirm part number 90503-MAH-000 is the correct collar for your engine.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this collar meets the original dimensional and material specifications required for correct mounting on GX610 and GX620 engines.
- Direct OEM Replacement — replaces the original collar exactly, allowing straightforward installation without rework or adaptation.
- GX610 and GX620 Fitment — designed specifically for these large-displacement horizontal shaft engines; confirm your model before ordering.
- Serial Number Verification Advised — Honda updates part numbers at serial breaks, so cross-reference your engine serial number against the fitment table to confirm this is the correct collar for your unit.
An engine mounting collar acts as a precision spacer or locating sleeve at the point where the engine is secured to its mounting surface or frame. It controls the position and alignment of the engine relative to the equipment it drives, distributing clamping loads evenly and preventing the fastener or housing from wearing into the engine casting. When a mounting collar is worn, cracked, or missing, the engine can shift under load, accelerating wear on both the engine and the driven equipment and introducing vibration that affects overall performance.
Part Details
| Part Number | 90503-MAH-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Engine Mounting Collar |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX610, GX620 | 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.
