The Honda 90512-751-000 Pinion Gear Shim C (36X43.5X1.35) is a genuine OEM component designed for H3011 riding mowers and H4013 lawn tractors. As a direct Honda OEM part, this shim is manufactured to the exact dimensional specifications required for correct pinion gear clearance and alignment in these machines. Confirm your serial number against the fitment table before ordering, as Honda updates part numbers at production breaks and this listing covers specific serial ranges. When the drivetrain is properly shimmed, gear mesh is consistent and the transmission operates smoothly under load.
Key Features
- Exact Dimensional Specification — at 36 x 43.5 x 1.35 mm, this shim sets the correct axial clearance for the pinion gear; even a fraction of a millimeter off can cause premature gear wear or drivetrain noise
- Genuine Honda OEM Part — sourced directly from Honda, part number 90512-751-000 meets the original specification for H3011 and H4013 drivetrain assembly
- Serial Number Verification Recommended — Honda supersedes shim specifications at production breaks, so match your machine's serial number to the fitment table to confirm this is the correct shim for your unit
- Correct Gear Mesh Restored — a worn, missing, or incorrectly sized shim allows excessive pinion gear play, leading to uneven wear, noise, and accelerated damage to the transmission
A pinion gear shim is a precision-thickness spacer used to set the exact axial position of the pinion gear within the drivetrain. By controlling the amount of clearance between mating gear faces, the shim ensures consistent tooth engagement under the varying loads a riding mower or lawn tractor experiences during operation. When a shim is worn, deformed, or the wrong thickness, gear backlash increases, resulting in drivetrain noise, rough engagement, and accelerated wear on surrounding components. Replacing it with the correct OEM shim restores proper gear mesh and protects the broader transmission assembly.
Part Details
| Part Number | 90512-751-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Pinion Gear Shim C (36X43.5X1.35) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Lawn Tractor | H4013 | All |
| Riding Mower | H3011 | 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.
