Description
Overview:
This Valve Stem Seal is a genuine Yanmar part designed for L-series single-cylinder diesel engines such as the L60 and L70. It sits on the valve guide to control oil passing down the valve stem, helping to stop oil entering the combustion chamber. Built from durable, oil- and heat-resistant elastomer with a precision sealing lip and a rigid outer body for stability, it provides a reliable, long-lasting seal under engine operating temperatures. By maintaining the correct oil control at the top end, it helps preserve compression, reduce exhaust smoke, and protect internal components from carbon build-up. Ideal for service and overhaul work on small plant and garden machinery powered by Yanmar L60/L70 engines, this is a precise, direct-fit replacement for worn seals.
Key Features:
- Genuine Yanmar part for assured fit and performance on L60 and L70 engines
- Controls oil on the valve stem to prevent oil leakage into the combustion chamber
- Oil- and heat-resistant elastomer construction with a stable metal body for durability
- Helps reduce blue smoke, oil consumption, and carbon deposits for cleaner running
- Precise dimensions for correct seating on the valve guide and consistent sealing pressure
- Direct replacement with no modifications required, suitable for routine maintenance or rebuilds
- Supports smoother starting and stable idle by maintaining proper combustion conditions
- Manufactured to Yanmar's quality standards for reliability in daily use
- Replaces Yanmar MPN 114350-11340
Typical Applications:
Used during top-end services, repairs, or full engine overhauls on small diesel equipment powered by Yanmar L-series engines, including generators, pumps, plate compactors, tillers, and other compact construction or garden machinery. Ideal when addressing oil consumption, exhaust smoke, or after valve work.
Also known as:
Valve guide seal, valve stem oil seal, stem oil seal, top-end oil seal, umbrella-type valve seal.
Fits Models:
178F, L60, L60AE, L70, L70AE, L70N
Alternate Part Numbers:
114350-11340, 11435011340
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