The Honda 14781-MB9-000 Valve Cotter is a genuine OEM component designed for BF75 and BF90 outboard motors and GD320 and GD410 horizontal shaft diesel engines. As a direct Honda OEM part, it meets the exact specifications Honda calls for in these applications, ensuring the valve train assembly performs as intended. Confirm your unit's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks across these model lines.
Key Features
- Genuine OEM Valve Retention — sourced directly from Honda, this cotter is manufactured to the precise geometry required to lock the valve spring retainer securely in place on your BF75, BF90, GD320, or GD410.
- Exact OEM Fit — replaces the original cotter directly with no reworking of the valve stem or retainer; correct taper and dimensions are critical here, and this part delivers them.
- Wide Fitment Across Two Machine Classes — covers BF75 and BF90 outboard motors as well as GD320 and GD410 horizontal shaft diesel engines; check part number 14781-MB9-000 against your Honda parts diagram to confirm applicability.
- Serial Number Verification Recommended — Honda revises valve train components at specific production breaks, so always match your machine's serial number to the fitment table before placing your order.
A valve cotter — sometimes called a valve keeper — is a small split wedge that locks the valve spring retainer onto the valve stem. Installed in pairs, the two cotters seat into a groove machined into the stem and are held under compression by the retainer and spring above them. This locking arrangement keeps the valve spring loaded correctly against the cylinder head throughout the engine's operating cycle. When a cotter cracks, deforms, or works loose, the valve spring retainer can release, causing the valve to drop into the combustion chamber — a failure that results in immediate and severe internal engine damage.
Part Details
| Part Number | 14781-MB9-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Valve Cotter |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Diesel Engine | GD320, GD410 | All |
| Outboard Motor | BF75, BF90 | 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.
