Cylinder Head Gasket 11141-93E20

Function and Technical Context

The cylinder head gasket acts as a watertight seal between the engine block and the cylinder head, ensuring the integrity of the cooling, lubrication and combustion chamber circuits simultaneously. In small-displacement outboard engines such as the Suzuki DF9.9 and DF15, this component operates under constant thermal cycles and elevated pressures inherent to combustion, while also withstanding the passage of coolant from the seawater cooling system. Failure of this component can cause combustion gases to mix with coolant, loss of compression in the affected cylinder, or engine overheating with risk of serious damage to the cylinder head or block. Its proper installation is therefore critical to the reliability and service life of the powerplant.

When Should This Component Be Replaced?

The most common symptoms of a deteriorated cylinder head gasket in outboard engines include white or bluish smoke from the exhaust, gas bubbles in the expansion tank or cooling circuit, progressive loss of power and abnormal variations in engine temperature. It is recommended to inspect and replace the cylinder head gasket whenever the cylinder head is removed for any reason, as well as in the presence of any of the above symptoms or following impacts or overheating that may have compromised the seal. Preventive replacement of this component at the first sign of failure prevents major breakdowns that could leave the vessel inoperable at sea and result in costly repairs to the cylinder head-block assembly.

Compatible Johnson/Evinrude Engines

Equivalent Manufacturer References