Description
Overview:
This Genuine Kohler Plug, Sq Hd Pipe 3/8" (OEM 25 139 57-S) is a metal, square‐head pipe plug used to seal threaded ports on Kohler petrol engines. It helps maintain correct sealing of oil and air passages, preventing leaks and protecting engine performance. The 3/8 in pipe size is supplied alongside a square external head for positive engagement with a spanner or adjustable wrench, making removal and refitting straightforward. Suitable for a wide range of Kohler engines used in lawn and garden machinery, commercial mowers, generators and compact construction equipment, including popular models such as CH11 and CH25. Thread size: 3/8 in (9.5 mm) pipe thread. Being a genuine Kohler part ensures accurate fit, dependable sealing, and compatibility with the engines listed.
Key Features:
- Genuine Kohler part for assured compatibility and quality (OEM 25 139 57-S)
- 3/8 in (9.5 mm) pipe thread for the correct port size on specified Kohler engines
- Square head for secure tool grip and easier installation/removal in tight spaces
- Durable metal construction for long service life under engine vibration and temperature changes
- Precision-machined threads for reliable sealing when installed per the engine manual
- Helps prevent oil and gas leaks from unused or service ports, supporting engine reliability
- Direct replacement for worn or damaged plugs to reduce downtime
- Suitable for routine servicing and overhaul work across many Kohler engine families
- Backed by Kohler's manufacturing standards for consistency and fit
- Compatible with a wide range of engines used in garden, landscaping, and commercial equipment
Typical Applications:
Sealing threaded ports on Kohler engines during maintenance, rebuilds, or component replacement. Commonly used to close off oil gallery, crankcase, or manifold service points on ride‐on mowers, zero‐turns, garden tractors, compact utility equipment, generators, and similar machinery powered by the listed Kohler engines.
Also known as:
Kohler engine pipe plug, Kohler square head plug, 3/8 in pipe plug (9.5 mm), square head gallery plug, engine block pipe plug.
Fits Models:
CH11, CH25, CH410, CH430, CH450, CH670, CH680, CH682, CH730LP, CH740LP/NG, CH745, CV14, CV15, CV430, CV450, CV460, CV461, CV490, CV491, CV492, CV493, CV620, CV624, CV640, CV670, CV675, CV680, CV682, CV732, CV742, CV745, ECH730, ECV630, EKT740, EKT750, EZT715, EZT725, EZT740, EZT750, KS530, KS540, KS595, KT600, KT610, KT620, KT715, KT725, KT730, KT735, KT740, KT745, SV470, SV471, SV480, SV530, SV541, SV590, SV591, SV600, SV601, SV610, SV620, SV710, SV715, SV720, SV725, SV730, SV735, SV740, SV810, SV820, SV830, SV840, ZT710, ZT720, ZT730, ZT740
Alternate Part Numbers:
25 139 57S, 2513957-S, 2513957S
Product Specifications
| L&S Part No. | 25 139 57-S |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Kohler |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Kohler |
| Key Features | - Genuine Kohler part ensures compatibility with specified engines - 3/8 in (9.5 mm) pipe thread for correct port size - Square head allows secure tool grip for easy installation - Durable metal construction withstands engine vibration - Fits a wide range of Kohler engine models listed |
| Fits Models | KS530 | KS540 | KS595 | KT600 | KT610 | KT620 | KT715 | KT725 | KT730 | KT735 | KT740 | KT745 | EKT740 | EKT750 | CH745 | ECH730 | CV745 | ECV630 | CH730LP | CH740LP/NG | CH11 | CH410 | CH430 | CH450 | CV14 | CV15 | CV430 | CV450 | CV460 | CV461 | CV490 | CV491 | CV492 | CV493 | CH25 | CH670 | CH680 | CH682 | CV620 | CV624 | CV640 | CV670 | CV675 | CV680 | CV682 | CV732 | CV742 | ZT710 | ZT720 | ZT730 | ZT740 | EZT740 | EZT750 | EZT715 | EZT725 | SV470 | SV471 | SV480 | SV530 | SV541 | SV590 | SV591 | SV600 | SV601 | SV610 | SV620 | SV710 | SV715 | SV720 | SV725 | SV730 | SV735 | SV740 | SV810 | SV820 | SV830 | SV840 |
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