Gasket Head - Mercury / Mariner 150 / 175 HP 2.4 Liter V6 (1991) OEM# 27-187861 | WSM 505-46

Gasket Head Mercury / Mariner 150 / 175 Hp 2.4 Liter V6 89-91 OEM# 27-187861

This WSM gasket head is a quality aftermarket replacement part designed for Mercury 6 Cyl 3.375 Steel Bore 2.4L XR-4 150 and 2 other compatible models.

It replaces selected OEM reference numbers including 27-187861, 27-187863, 27-18786T and is suitable for service, repair and rebuild work.

Key Features

• Quality replacement gasket designed for dependable sealing performance
• Ideal for service, repair and engine rebuild work
• Manufactured for fit, durability and reliable installation
• Compatible with 3 listed fitments
• Replaces selected OEM reference numbers listed below

Product Details

• Brand: WSM
• WSM Part Number: 505-46
• Product: Gasket Head
• OEM Reference: 27-187861, 27-187863, 27-18786T
• Application: Mercury 6 Cyl 3.375 Steel Bore 2.4L XR-4 150 and 2 other compatible models

Product Fitment

This part is suitable for the following models:

• Mercury 6 Cyl 3.375 Steel Bore 2.4L XR-4 150 – 1990-1991
• Mercury 6 Cyl 3.375 Steel Bore 2.4L XR-4 175 – 1990-1991
• Mercury – 1991

Why Buy WSM

WSM is a trusted manufacturer of aftermarket marine and powersports parts, known for dependable quality, strong fitment coverage and workshop-ready replacement components.

About the Mercury 135-200 HP Outboard Engines

Mercury and Mariner 135-200 HP outboard engines are widely used across recreational and performance boating applications. These engines have long-standing aftermarket support, making quality replacement gaskets, ignition, fuel and powerhead parts important for service and rebuild work.

You May Also Need

Browse related parts for compatible models:

• Bearing Needles Mercury / Mariner 105 - 240 Hp Big Pin OEM# 29-822553 – 010-137-34
• Water Pump Impeller Force / Mercruiser / Mercury 65 - 300 Hp OEM# 18-3017 – 700-205
• Thermostat Mercury 7.5 - 250 Hp 72-06 OEM# 62981 – 775-25
• Connecting Rod Mercury / Mariner 105 - 240 Hp V6 OEM# 644-818141A13 – 800-210

Please use the fitment guide, OEM references and images to confirm this is the correct part before ordering.