Certification: ISO9001 factory production; CE documents available upon request
Real Product Photos: Cylinder head gasket full view, sealing surface close‑up, Yamaha Enduro 40HP outboard mounting reference picture
This robust aftermarket cylinder head gasket serves as a trustworthy drop‑in replacement for Yamaha Enduro 40HP two‑stroke outboard motors. It works as a cross‑match for OEM part numbers 6F5‑11181‑A1 and 6F5‑11181‑A2.
It is built from multi‑layer composite sealing material that holds up well against high temperatures. This head gasket features solid pressure tolerance, good heat stability and superior anti‑corrosion properties.
It can handle intense combustion pressure, repeated temperature shifts and damp, salt‑laden marine environments, so it keeps consistent sealing capability over time.
Fitted between the cylinder head and engine block, this gasket forms a tight seal for combustion chambers and cooling water passages.
Thanks to its secure sealing effect, it stops compression loss, cooling‑water seepage, gas blow‑by and cross‑mixing between coolant and combustion gas. In turn, it maintains steady cylinder compression to support smooth engine running.
This gasket is produced to meet rigid OEM specifications, so it perfectly matches the original contour, port layout and thickness. It fixes frequent top‑end issues. These include gasket blow‑out, water intrusion inside cylinders, compression drop, engine over‑heating and power reduction, all of which stem from worn, burnt or broken original‑equipment head gaskets.
For Yamaha Outboard part number: 6F5-11181-A0-00, 6F5-11181-A1/A2, 6F5-11181-00/01
For Yamaha Outboard Enduro 40HP 2-stroke engines
Cylinder Head Gasket



1 years
China