The Honda 90511-751-000 is a genuine OEM Pinion Gear Shim B (36X43.5X1.30) designed for H3011 riding mowers and H4013 lawn tractors. As a direct Honda OEM component, this shim is produced to the exact dimensional specification shown — 36 mm inner diameter, 43.5 mm outer diameter, and 1.30 mm thickness — ensuring correct gear mesh and axial positioning within the drivetrain. Verify your machine's serial number against the fitment table before ordering, as Honda updates parts at specific serial breaks and the correct shim thickness is critical to proper gear operation.
Key Features
- Exact Dimensional Match — produced to Honda's precise 36x43.5x1.30 mm specification, which governs correct pinion gear alignment and load distribution in the drivetrain
- Genuine Honda OEM Part — sourced directly from Honda; part number 90511-751-000 guarantees the correct thickness variant for the application, where even a fraction of a millimeter affects gear engagement
- Confirmed Fitment — listed for H3011 riding mowers and H4013 lawn tractors; check your serial number against the compatibility table to confirm this is the right shim for your specific unit
- Drivetrain Precision — a correctly shimmed pinion gear maintains proper backlash and bearing preload; an incorrectly sized shim can cause premature gear wear, noise, or loss of drive
A pinion gear shim is a precision-thickness spacer used to set the correct axial position of the pinion gear within the drivetrain of a riding mower or lawn tractor. By controlling the gear's side-to-side placement, the shim determines how cleanly the pinion meshes with the mating gear — too much or too little clearance leads to uneven tooth contact, accelerated wear, and drivetrain noise. When a shim is worn, deformed, or replaced with one of the wrong thickness, gear mesh quality deteriorates and the drivetrain may become noisy or lose efficiency over time.
Part Details
| Part Number | 90511-751-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Pinion Gear Shim B (36X43.5X1.30) |
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.
