Cylinder Head Gasket for Mercury & Mariner 4HP5HP 2-Stroke Outboards
Replaces Mercury Part Numbers: 27-812939015, 27-812939

This high-quality marine gasket seals the cylinder head to the engine block, maintaining compression and preventing leaks in small Mercury and Mariner 2-stroke outboards. Ideal for engine servicing, rebuilds, or preventative maintenance.

Fits the following engines:

• Mercury 4HP 2-Stroke

• Mercury 5HP 2-Stroke

• Mariner 4HP 2-Stroke

• Mariner 5HP 2-Stroke

Key Features:

• Replaces OEM part 27-812939015

• Built to withstand marine conditions

• Reliable sealing performance

• Easy installation direct OEM-style fit

• Perfect for small engine rebuilds or repairs

Please check compatibility before purchasing.
It is the buyers responsibility to confirm the correct fitment.
If youre unsure, contact us our SSI Marine team is happy to help.

Why Buy from SSI Marine?

• Trusted UK supplier of marine engine parts

• All items in stock same-day dispatch (before 1 PM)

• 24-hour delivery

• Expert marine support and advice