Description
Overview:
This Valve Stem Seal is a Genuine Honda part for small four-stroke engines, designed to stop engine oil from leaking down the valve guide into the combustion chamber. Manufactured from durable, oil- and heat-resistant elastomer with a metal outer shell and a tension spring on the sealing lip, it maintains a reliable seal under sustained engine temperatures. It is engineered for a precise fit in Honda GXH50 and GXH50U engines, helping keep exhaust smoke down and oil consumption in check while protecting the valve train. Supplied as Honda MPN 12209-ZM7-003, it is an OEM component that supports long service life and consistent performance in compact equipment used by trades, grounds care, and DIY users.
Key Features:
- Genuine Honda OEM part for assured compatibility and quality (MPN 12209-ZM7-003)
- Prevents oil leakage down valve guides to reduce smoke and oil use
- Oil- and heat-resistant elastomer with metal shell and spring-loaded lip for secure sealing
- Precision fit for Honda GXH50 family for dependable operation
- Supports cleaner running and helps protect the valve and guide from oil fouling
- Durable construction for long service intervals
- Straightforward to replace during top-end/cylinder head service with standard workshop tools
Typical Applications:
Commonly used in Honda-powered compact machinery such as small water pumps, pedestrian lawn mowers, edgers, and light construction equipment using GXH/GXV-series engines. Ideal when rebuilding a cylinder head, curing oil smoke on start-up or overrun, or as preventative maintenance to maintain stable running and reduce oil consumption.
Also known as:
Valve guide oil seal, valve stem oil seal, umbrella seal, oil control valve seal, top-end valve seal.
Fits Models:
GXH50, GXH50U, GXH50UT, GXV50, GXV50U, GXV57, GXV57U, WX15
Alternate Part Numbers:
12209-ZM7-003, 12209ZM7003
Product Specifications
| L&S Part No. | 12209 ZM7 003 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Honda |
| OEM No. | 12209ZM7003 |
| Unit of Sale | 1 |
| Applications | GXH50, GXH50U, GXH50UT, GXV50, GXV50U, GXV57, GXV57U, WX15 |
| Machine Type | Engines |
| Fits Brands | Honda |
| Fits Models | GXH50 (GCAL) | GXH50UT (GCBYT) | GXH50U (GCAFK) (Mixer Spec) | GXV50U (GJAAK) | GXV50 (GJAG) | GXV57U (GJAJK) | GXV57 (GJALM) | WX15 |
