Description
Overview:
This Genuine Zenith needle valve (MPN 013603) is a precision fuel‐metering component for Zenith 24T carburettors used on classic JAP and Villiers engines. Manufactured from durable, corrosion‐resistant metal with a finely tapered needle, it regulates fuel flow into the carburettor for stable idle, clean acceleration, and consistent running. Supplied as unused old stock, it retains original build quality, with possible cosmetic tarnishing only. Designed as a direct replacement for worn or leaking valves, it helps restore correct mixture control on vintage stationary engines and small machinery. Ideal for maintaining period-correct performance on models such as the Zenith 24T and JAP 4, this part supports reliable starting, smooth throttle response, and efficient fuel use in workshop and field conditions.
Key Features:
- Genuine Zenith part for assured compatibility and performance (MPN 013603)
- Precision-machined needle for accurate fuel flow control and stable tuning
- Durable metal construction for long service life in vintage applications
- Direct-fit design to suit Zenith 24T-series carburettors; no modifications required
- Helps cure hard starting, poor idle, and rich/lean running caused by worn valves
- Unused old stock; original quality with possible light tarnish from storage
- Supports reliable operation of classic JAP and Villiers engines
- Suitable for professional workshops and DIY restoration projects
Typical Applications:
Used during carburettor overhaul or routine service to restore precise metering on vintage engines powering compact plant, stationary engines, and heritage equipment. Common in classic workshop rebuilds, show restorations, and ongoing maintenance of older machinery where stable idle, smooth pick‐up, and correct fuel economy are required.
Also known as:
Carburettor needle valve, carb needle, fuel metering needle, fuel valve, needle jet valve, carb fuel control needle, Zenith 24T needle, JAP carb needle.
Fits Models:
JAP 3, JAP 4, JAP 5, JAP 6, M40, MK20, MK25, MK25 C25, MK40, Zenith 24T, Zenith 24T-2
Alternate Part Numbers:
013603
Product Specifications
| L&S Part No. | 013603 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Zenith |
| OEM No. | 013603 |
| Unit of Sale | 1 |
| Applications | JAP 3, JAP 4, JAP 5, JAP 6, JAP3, JAP4, JAP5, JAP6, M40, MK20, MK25, MK25 C25, MK25C25, MK40, Zenith 24T, Zenith 24T-2 |
| Machine Type | Engines |
| Fits Brands | JAP, Villiers, Zenith |
| Fits Models | MK25 / C25 | JAP 4, 3 | Zenith 24 T-2 | JAP 5 | JAP 6 | MK20 | MK40 |
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