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Description
X-42-15-S – Kohler Flywheel Key (OEM Replacement Woodruff Key)
The X-42-15-S Kohler Flywheel Key is a genuine OEM replacement key designed to securely align and position the flywheel on compatible Kohler small engines. This precision-machined flywheel key ensures accurate ignition timing by maintaining the correct relationship between the crankshaft and flywheel, helping deliver reliable engine starting, smooth operation, and consistent performance.
Manufactured from high-strength steel to Kohler's exact specifications, the X-42-15-S is designed to shear under severe impact, protecting the crankshaft and flywheel from costly damage if the engine experiences a sudden stop caused by striking a solid object.
Product Details
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Part Number: X-42-15-S
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Brand: Kohler
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Part Type: Flywheel Key (Woodruff Key)
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Material: Hardened Steel
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Installation: Direct OEM Replacement
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Genuine Kohler OEM Part
Key Features
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Genuine Kohler OEM replacement part
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Precision-machined for accurate flywheel alignment
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Maintains proper ignition timing
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Hardened steel construction for durability
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Designed to protect the crankshaft and flywheel during sudden impacts
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Direct-fit installation
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Long-lasting OEM performance
Function
The Kohler X-42-15-S Flywheel Key locks the flywheel into its correct position on the crankshaft, ensuring precise ignition timing. If the engine blade or rotating assembly strikes an obstacle, the key is engineered to shear before major engine components are damaged, making it an important protective component.
Compatible Equipment
The Kohler X-42-15-S Flywheel Key fits a wide variety of Kohler gasoline engines, including many used on:
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Zero-turn mowers
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Riding lawn mowers
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Walk-behind mowers
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Garden tractors
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Commercial turf equipment
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Utility equipment
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Generators
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Other outdoor power equipment equipped with compatible Kohler engines
Always verify your engine model and OEM part number before ordering.
Who Is This For?
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Homeowners
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Commercial landscapers
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Small engine repair technicians
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Outdoor power equipment dealers
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Grounds maintenance professionals
Recommended Applications
Ideal for replacing a damaged or sheared flywheel key during flywheel service, ignition repairs, engine rebuilds, or after impact-related engine shutdowns.
Pros
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Genuine Kohler OEM quality
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Precision fit for accurate ignition timing
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Hardened steel construction
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Protects expensive engine components
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Easy direct replacement
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Long-lasting reliability
Cons
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Fits only compatible Kohler engines
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Flywheel should be properly torqued during installation to prevent premature key failure
Comparison – Kohler X-42-15-S vs Generic Flywheel Keys
Kohler X-42-15-S
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Genuine OEM specifications
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Precision-machined dimensions
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Reliable ignition timing
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Proper sacrificial protection during impacts
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Superior fit and durability
Generic Flywheel Keys
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May vary in dimensions or hardness
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Can affect ignition timing accuracy
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Less consistent manufacturing quality
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Reduced reliability in demanding applications
Why Buy from Barry's Power Equipment?
Barry's Power Equipment supplies genuine Kohler OEM engine parts trusted by professional landscapers, repair technicians, and outdoor power equipment owners.
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Genuine OEM Kohler replacement parts
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Fast nationwide shipping
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Competitive pricing
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Expert technical support
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Extensive inventory for Kohler and other leading outdoor power equipment brands
