Yanmar L40/L48 Crankcase Cover Gasket - OEM Number: 114250-01412

The Yanmar Crankcase Cover Gasket (OEM 114250-01412) is a genuine replacement engine sealing gasket designed for use on Yanmar L40 and L48 single-cylinder diesel engines. Positioned between the crankcase housing and crankcase side cover, this gasket provides a critical oil-tight seal that prevents lubricant leakage while maintaining the correct internal operating environment of the engine. Yanmar parts manuals identify OEM 114250-01412 as a Gasket, Crank Case for L40AE and L48AE engine models.

Manufactured to OEM specifications, the gasket is designed to withstand engine vibration, thermal cycling, oil exposure, and prolonged service conditions. Maintaining a reliable seal is essential for preserving engine oil levels, preventing contamination, and ensuring long-term engine reliability.

FUNCTION AND OPERATION

• Creates an oil-tight seal between the crankcase and crankcase cover
• Prevents engine oil leakage from the crankcase assembly
• Helps maintain correct crankcase pressure and lubrication
• Protects internal engine components from dirt and moisture ingress
• Supports long-term engine reliability and performance
• Designed for industrial, agricultural, generator, and pump applications

TECHNICAL DETAILS

• OEM Part Number: 114250-01412
• Type: Crankcase cover gasket
• Function: Engine sealing gasket
• Application: Crankcase side cover assembly
• Engine Compatibility: Yanmar L40 and L48 diesel engines
• Construction: Oil-resistant gasket material
• Design: OEM-configured direct replacement gasket

Yanmar parts catalogues list 114250-01412 as a crankcase gasket used on L40AE and L48AE engine variants, fitted between the crankcase housing and cover assembly.

TYPICAL APPLICATIONS

Suitable for a range of Yanmar engines and equipment, including:

• Yanmar L40AE diesel engines
• Yanmar L48AE diesel engines
• Diesel generators
• Water pumps
• Agricultural machinery
• Construction equipment
• Industrial power units

Aftermarket and OEM parts suppliers also identify 114250-01412 as a crankcase cover gasket for Yanmar L48 engines and related L-series applications.

IMPORTANT INFORMATION

Always confirm the correct OEM part number, engine model, and serial number before ordering, as Yanmar L-series engines use several different crankcase covers and gasket variations. OEM 114250-01412 is specifically listed as a crankcase gasket for L40AE and L48AE engine families.

A damaged, hardened, torn, or improperly installed crankcase gasket can lead to engine oil leaks, contamination ingress, loss of lubrication, and reduced engine reliability. When replacing the gasket, it is recommended to inspect the crankcase cover, oil seals, mating surfaces, and retaining bolts for wear or damage. Experienced Yanmar engine owners frequently note that gasket condition becomes increasingly important on high-hour engines, where ageing seals and gaskets are often the source of oil leaks and reduced engine performance.

DELIVERY OPTIONS (UK mainland only)

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