Description
Overview:
The Valve Rocker Adjusting Screw Nut is a small but critical fastener for securing the valve clearance setting on Villiers industrial engines. Made from durable steel with a hex profile for standard spanners, it locks the rocker adjusting screw so your set clearance stays stable under vibration and load. This Genuine Villiers part (OEM EM1197) is intended for use on Mk15 and MK15/2 C15 engines and is a direct-fit replacement for worn or missing hardware in the rocker gear assembly. As unused old stock, it may show light tarnishing from storage, which does not affect function. Use it during valve setting, servicing, or rebuilds to keep the top end reliable and to support smooth, efficient running in demanding industrial use.
Key Features:
- Genuine Villiers part for assured compatibility and fit (OEM EM1197)
- Direct replacement for the original rocker adjuster locknut; no modification required
- Steel construction for strength and dependable clamping on the adjuster screw
- Precise thread and hex form for consistent torqueing and repeatable valve settings
- Helps maintain correct valve clearance, supporting smooth running and longevity
- Resists loosening from engine vibration when tightened to the service manual guidance
- Suitable for routine maintenance, top-end overhauls, and full engine rebuilds
- Compact form factor for easy access in confined rocker box spaces
- Unused vintage stock; minor cosmetic tarnish possible without impacting performance
- Supports reliable operation in industrial environments and continuous-duty applications
Typical Applications:
Used when setting or locking valve clearances on Villiers Mk15-series industrial engines during servicing or rebuilds. Common across equipment powered by these engines, such as generators, water pumps, compactors, concrete mixers, and grounds-care machinery. Ideal for preventative maintenance to keep valve gear stable and reduce the risk of tappet noise or accelerated wear.
Also known as:
Valve adjustment nut, rocker screw nut, tappet adjuster nut, rocker adjuster locknut, jam nut for rocker adjuster, valve clearance locknut.
Fits Models:
MK15/2 C15, Mk15
Alternate Part Numbers:
EM1197
Product Specifications
| L&S Part No. | EM1197 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Villiers |
| OEM No. | EM1197 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Villiers |
| Key Features | - Genuine Villiers part for Mk15 and MK15/2 C15 engines - Steel construction ensures strength and reliable clamping - Hex profile compatible with standard spanners - Direct replacement; no modification needed - Maintains valve clearance under vibration and load |
| Fits Models | MK15 |
Reviews
Ask a Question
Compatibility
Customers also bought
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£83.17 £69.31 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£83.68 £69.73
Related Products
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£83.17 £69.31 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£83.68 £69.73
