Gasket Exhaust - Mercury / Mariner 70-90 HP 3 Cyl (1987) OEM# 27-430042 | WSM 521-21

Gasket Exhaust Mercury / Mariner 70 - 90 Hp 3 Cyl 87 OEM# 27-430042

This WSM gasket exhaust is a quality aftermarket replacement part designed for Mariner 3 Cyl 3.375 Bore Looper 70 and 4 other compatible models.

It replaces selected OEM reference numbers including 27-430042 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 5 listed fitments
• Replaces selected OEM reference numbers listed below

Product Details

• Brand: WSM
• WSM Part Number: 521-21
• Product: Gasket Exhaust
• OEM Reference: 27-430042
• Application: Mariner 3 Cyl 3.375 Bore Looper 70 and 4 other compatible models

Product Fitment

This part is suitable for the following models:

• Mariner 3 Cyl 3.375 Bore Looper 70 – All Years
• Mercury 3 Cyl 3.375 Bore Looper 75 – 1987
• Mercury 3 Cyl 3.375 Bore Looper 80 – 1987
• Mercury 3 Cyl 3.375 Bore Looper 90 – 1987
• Mercury – 1987

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.

You May Also Need

Browse related parts for compatible models:

• O-Ring End Cap Mercury / Mariner 65 - 250 Hp OEM# 2406 – 526-14
• Trigger Mercury / Mariner 50 - 90 Hp 3 Cylinder 87-98 OEM# 99021A13 – 363-9021-3
• Water Pump Kit Complete Force / Mercury / Mariner / Mercruiser 30 - 300 Hp OEM# 18-3570 – 750-155
• Water Pump Kit Complete Force / Mercury / Mariner 30 - 125 Hp OEM# 43026T9 – 750-156

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