Description
Overview:
The valve rotator is a compact, disc-type replacement part for Yanmar single‐cylinder diesel engines, including the L90 and L100. It sits on the valve stem and promotes controlled valve rotation during operation. This helps distribute wear evenly across the valve face and seat, supports stable sealing, and reduces carbon build‐up. Made from robust, machined steel for long service life in hot, high‐vibration environments, it is engineered to match OEM reference 104211-11370. Key dimensions are: stem depth 3 mm, outer diameter 10.9 mm, inner diameter 6.7 mm. Suitable for maintenance of construction and garden machinery powered by these engines, it is supplied individually so you can replace a single worn component without changing the whole valve assembly. Designed for a precise fit on L‐series platforms.
Key Features:
- Helps maintain valve rotation to limit seat and face wear and support consistent compression
- Precision dimensions for reliable fit: 3 mm stem depth, 10.9 mm O/D, 6.7 mm I/D
- Machined steel construction for durability under heat and vibration
- Direct replacement for OEM reference 104211-11370
- Supports efficient running by helping to reduce carbon build‐up on the valve interface
- Designed for a like‐for‐like fit when matched to the specified engines
- Suitable for targeted repairs; sold individually
- Aids smooth starting, stable idle, and sustained power by maintaining valve sealing performance
Typical Applications:
Routine servicing and corrective repairs on Yanmar L‐series diesel engines used in generators, water pumps, plate compactors, small plant, and garden or agricultural equipment. Ideal when addressing poor compression, irregular idle, or accelerated valve seat wear traceable to a worn rotator.
Also known as:
Valve spinner, engine valve rotator, valve turner, valve rotation device, valve seat wear reducer (rotator).
Fits Models:
186F, L100, L75, L90, L90AE
Alternate Part Numbers:
104211-11370, 10421111370
Product Specifications
| L&S Part No. | 320 335 |
|---|---|
| Unit of Sale | 1 Pair |
| Machine Type | Engines |
| Fits Brands | Chinese, Yanmar |
| Key Features | - Compatible with Yanmar L90 and L100 engines - Precision fit: 3 mm stem depth, 10.9 mm O/D, 6.7 mm I/D - Machined steel for durability in high-vibration environments - Direct replacement for OEM reference 104211-11370 - Sold individually for targeted valve repairs |
| Fits Models | L90AE |
