Description
Overview:
This Kit, Piston with Ring Set (.50) for Kohler engines is a genuine replacement designed to restore proper compression and oil control in small petrol engines. Supplied as a matched piston and ring set, it is intended for cylinders that have been correctly rebored and honed to the .50 oversize specification. The piston is a durable alloy component and the rings are engineered for reliable sealing and long service life. It is suitable for a range of Kohler applications found in garden and light construction machinery, including models such as CH11 and CV14. As an OEM part (12 874 03-S), it provides a precise fit and consistent performance, helping engines start easily, run smoothly, and maintain power output under regular working conditions.
Key Features:
- Genuine Kohler part for assured compatibility and quality
- .50 oversize for use after a professional rebore and hone to specification
- Precision-machined piston and ring set for stable compression and reduced blow-by
- Durable materials for dependable operation and wear resistance
- Direct replacement for OEM No. 12 874 03-S
- Helps reduce oil consumption and exhaust smoke when installed correctly
- Supports smooth starting, steady idle, and improved overall efficiency
- Designed to suit selected Kohler engines used in lawn and garden equipment and compact machinery
- Straightforward installation for competent technicians using standard workshop tools
Typical Applications:
Used during top-end rebuilds of Kohler engines in ride-on mowers, walk-behind mowers, generators, pressure washers, and compact equipment. Ideal where the cylinder has been bored to .50 oversize and a matched piston and ring set is required to restore performance, reliability, and service life.
Also known as:
Piston and ring assembly (.50 OS), oversize piston set for Kohler, 0.020 in oversize piston and rings (approx. 0.51 mm), cylinder oversize piston kit, top-end service piston kit for Kohler Command/Command PRO series.
Fits Models:
CH11, CV14, CV460, CV461
Alternate Part Numbers:
12 874 03S, 1287403-S, 1287403S
Product Specifications
| L&S Part No. | 12 874 03-S |
|---|---|
| Part Type | Genuine Part |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Kohler |
| Key Features | - Genuine Kohler part ensures compatibility and quality - .50 oversize for rebored and honed cylinders - Precision-machined for stable compression and reduced blow-by - Suitable for Kohler models CH11, CV14, CV460, CV461 - Direct replacement for OEM No. 12 874 03-S |
| Fits Models | CH11 | CV14 | CV460 | CV461 |
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