Description
Overview:
This Valve Stem Seal is a genuine Yanmar component designed to control oil flow at the valve guide, helping prevent oil from entering the combustion chamber and reducing smoke and oil consumption. Made from oil‐resistant elastomer with metal reinforcement for stability, it is built for the heat and loads found in small diesel engines. It suits compact Yanmar industrial engines used in construction and landscaping equipment, including the L40AE and L48N‐S series. Manufactured to Yanmar's specifications, MPN 114250-11341 ensures correct dimensions and a reliable fit, restoring proper sealing performance during top‐end overhauls or routine maintenance. It is suitable for tradespeople maintaining fleet equipment and DIY users keeping generators, pumps, or compactors in good working order.
Key Features:
- Genuine Yanmar part (MPN 114250-11341) for assured compatibility and fit
- Helps prevent oil leakage past the valve guide, reducing exhaust smoke and oil use
- Maintains combustion cleanliness, protecting valves and improving long‐term engine health
- Oil‐ and heat‐resistant construction suitable for continuous industrial duty
- Consistent sealing performance for stable idling and smoother running
- Like‐for‐like replacement to match original dimensions and seating depth
- Suitable for routine maintenance or top‐end rebuilds on compatible engines
- Supports engine efficiency, helping maintain power output and fuel economy
Typical Applications:
Used on Yanmar single‐cylinder diesel engines commonly fitted to plate compactors, generators, water pumps, concrete mixers, and light construction machinery. Ideal when refurbishing cylinder heads, replacing worn valve train parts, or addressing oil smoke on start‐up and over‐run. Helps extend service intervals by limiting oil carry‐over and carbon build‐up.
Also known as:
Valve stem oil seal, valve guide seal, valve oil seal, stem seal, engine valve seal, top‐end valve seal. Commonly referred to during head rebuilds as a valve guide oil seal or valve stem lip seal.
Fits Models:
170F, L40, L40AE, L48, L48N-S, L48NS
Alternate Part Numbers:
114250 11340, 114250-11341, 11425011340, 11425011341
Product Specifications
| L&S Part No. | 114250 11341 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Yanmar |
| OEM No. | 114250-11341 |
| Unit of Sale | 1 |
| Applications | 170F, L40, L40AE, L48, L48N-S, L48NS |
| Machine Type | Engines |
| Fits Brands | Chinese, Yanmar |
| Fits Models | L40AE | L48N-S (Mixer) |
Reviews
Ask a Question
Compatibility
Customers also bought
-
![]()
Air Filter Assembly for Yanmar L40 L48 L60 L70£16.32 £13.60
