The Honda 14781-MA6-000 Valve Cotter is a genuine OEM component designed for Honda BF8, BF9, BF15, BF20, BF25, and BF30 outboard motors, BFP8, BFP9, BFP15, BFP20 portable outboard motors, GX640 horizontal shaft engines, H4518 lawn tractors, and H5518 multi-purpose tractors. As a direct Honda OEM part, it is manufactured to the same specification as the original, ensuring a correct fit without any adaptation. Honda supersedes parts across serial breaks, so confirm your unit's serial number against the fitment table before ordering to make sure part number 14781-MA6-000 is the right version for your machine.
Key Features
- Genuine OEM Valve Retention — manufactured by Honda to exact original specification, ensuring the cotter seats and locks correctly in the valve stem groove without modification.
- Broad Fitment Across Honda Lines — covers BF- and BFP-series portable outboard motors, GX640 horizontal shaft engines, H4518 lawn tractors, and H5518 multi-purpose tractors in a single OEM part number.
- Serial Number Verification Recommended — Honda updates valve train components at production breaks; check your machine's serial number against the compatibility table to confirm this is the correct cotter for your build.
- Critical Valve Train Integrity — a correctly seated cotter locks the valve spring retainer to the stem; a worn or missing cotter allows the retainer to slip, causing an immediate loss of valve control and engine function.
A valve cotter — sometimes called a valve keeper — is a small split clip that locks the valve spring retainer onto the valve stem. Installed in a matching groove on the stem, the two halves of the cotter clamp together under the retainer and hold the entire valve spring assembly in compression. Without a correctly seated cotter, the retainer can release under load, allowing the valve to drop into the combustion chamber and causing immediate, severe internal damage. Replacing a worn or cracked cotter at the first sign of valve train noise or during any top-end service is straightforward preventive maintenance that protects the rest of the engine or outboard powerhead.
Part Details
| Part Number | 14781-MA6-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Valve Cotter |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Engine | GX640 | All |
| Lawn Tractor | H4518 | All |
| Multi-Purpose Tractor | H5518 | All |
| Outboard Motor | BF25, BF30 | All |
| Portable Outboard Motor | BF8, BF9, BF15, BF20, BFP8, BFP9, BFP15, BFP20 | 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.
