Product Description
Kohler 52 139 09-S - Cup Plug OEM
The Kohler 52 139 09-S Cup Plug is a genuine OEM sealing plug designed to close and protect openings in Kohler engine blocks and housings. This precision-engineered plug helps prevent oil, coolant, or debris leakage while maintaining structural integrity in the engine’s lubrication and fluid passages. Perfect for engine rebuilds, replacements, and preventive maintenance.
What is this part & what does it do?
A cup plug fits into recessed cavities in an engine block, crankcase, or oil gallery to seal fluid channels and prevent leaks. Cup plugs help maintain proper fluid containment and system pressure, protecting internal engine components from contaminants and ensuring consistent performance.
Specifications
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Part Number: 52 139 09-S
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OEM Equivalent: 5213909S
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Part Type: Cup Plug / Engine Plug
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Brand: Kohler OEM
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Condition: New OEM Replacement
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Function: Seals fluid passages or openings in engine block
Features
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Genuine Kohler OEM replacement part
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Precision fit to OEM specifications
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Helps prevent oil and fluid leakage
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Easy press-in installation for blocked openings
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Ideal for engine rebuilds and maintenance
Replaces / Supersedes
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Replaces Kohler part 5213909S (alternate format) in OEM parts catalogs
Compatible With / Models Used On
This cup plug is used in Kohler engines where part 52 139 09-S or 5213909S is specified in the OEM parts diagram. Typical engine series and applications include:
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Kohler CV15-CV20 series engines
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Kohler CH14-CH20 series engines
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Small block industrial and marine engines with similar block openings
(Fitment varies by specific engine model code and revision — always verify with your engine’s model and serial number before ordering.)
If you need assistance please email Orders@mowpart.com
