MERCURY POWER HEAD GASKET 27-191861

Mercury / Mariner Powerhead Base Gasket (27-191861)

The 27-191861 is a high-quality adtermarket gasket designed to provide a critical seal between the engine powerhead and the driveshaft housing (the "base"). This gasket is essential for maintaining proper compression and preventing exhaust or cooling water leaks at the mating surface of the engine block.

Product Features

• OEM Reliability: Aftermarket Mercury Marine / Quicksilver part (replaces previous part numbers 27-19186 and 27-423702).

• Durable Construction: Engineered to withstand the high temperatures and corrosive environment of marine 2-stroke operation.

• Precision Fit: Die-cut for an exact match to the cylinder block and covers of small-chassis Mercury/Mariner outboards.

• Interchangeability: Also cross-references with part number 27-195992.

Fitment Guide

This gasket fits a wide range of Mercury and Mariner 2-Stroke (2-Cylinder) outboard engines, typically ranging from the late 1980s through the mid-2000s.

Compatible Horsepower Models:

• 6 HP / 8 HP (2-stroke models)

• 9.9 HP / 15 HP (Standard 2-stroke models)

• 10 HP (Including Magnum, Marathon, SeaPro, and Viking models)

• XR10 / Sailpower configurations

Specific Engine Series:

• Mercury/Mariner SeaPro & Marathon: Built for commercial and heavy-duty use.

• Mercury/Mariner Viking: Common in European markets.

• Mercury XR10: Performance-tuned small outboards.

Technical Specifications