Description
Overview:
This genuine Kohler engine bearing shell is sized .020 in undersize (0.51 mm) and is supplied under OEM No. 52 030 12-S. Built for Kohler KT17 and Magnum M18 twin‐cylinder engines, including KT17-24323 and M18-24500, it supports the crankshaft journal to maintain a stable oil film, reduce friction, and minimise wear. The silver, shell‐type plain bearing uses a robust steel backing with an anti‐friction lining for reliable load carrying and consistent clearances. It is typically selected during engine rebuilds to match a reground crankshaft journal and restore correct running clearance. Suitable for workshop or on‐site maintenance of garden and light construction machinery powered by these engines, it helps keep performance, efficiency, and service life on track when installed to the Kohler service specification.
Key Features:
- Genuine Kohler part for assured compatibility and specification
- .020 in undersize (0.51 mm) to suit reground crank journals and restore oil clearance
- Steel‐backed plain bearing with anti‐friction lining for durability under load
- Precision manufactured for stable oil film, reduced friction, and consistent performance
- Direct replacement for OEM 52 030 12-S on specified KT17 and M18 variants
- Helps reduce wear, noise, and vibration when clearances are set correctly
- Suitable for professional rebuilds and DIY overhauls following the Kohler service manual
- Designed to support reliable starts and long service intervals in varied operating conditions
Typical Applications:
Used during engine overhauls or repairs on Kohler KT17/M18 power units commonly found in garden tractors, ride‐on mowers, grounds‐care equipment, and compact machinery such as small generators or pumps. Selected when crank journals have been ground undersize to re‐establish correct bearing clearances and smooth engine operation.
Also known as:
Engine bearing shell .020 (0.51 mm), undersize crankshaft journal bearing, plain bearing insert for Kohler twin, KT17/M18 undersize bearing, rebuild bearing shell for Kohler opposed‐twin engines.
Fits Models:
KT17-24323, M18-24500, M18-24501, M18-24502, M18-24503, M18-24504, M18-24505, M18-24506, M18-24507, M18-24508, M18-24509, M18-24510, M18-24511, M18-24512, M18-24513, M18-24514, M18-24515, M18-24519, M18-24521, M18-24522, M18-24523, M18-24524, M18-24525, M18-24526, M18-24529
Alternate Part Numbers:
52 030 12S, 5203012-S, 5203012S
Product Specifications
| L&S Part No. | 52 030 12-S |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Kohler |
| OEM No. | 52 030 12-S |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Kohler |
| Key Features | - Genuine Kohler part for KT17 and M18 engines - .020 in undersize for reground crank journals - Steel-backed with anti-friction lining - Direct replacement for OEM 52 030 12-S - Fits KT17-24323, M18-24500 to M18-24529 models |
| Fits Models | KT17 | M18 |
Reviews
Ask a Question
Compatibility
Customers also bought
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£83.17 £69.31 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£83.68 £69.73
Related Products
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£83.17 £69.31 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£83.68 £69.73
