Gasket Thermostat - Mercury / Yamaha 9.9 / 15 HP 2 Cylinder (2008) OEM# 27-83940 | WSM 555-119

Gasket Thermostat Mercury / Yamaha 9.9 / 15 Hp 2 Cylinder 84-09 OEM# 27-83940

This WSM gasket thermostat is a quality aftermarket replacement part designed for Mariner 2 Cyl 2.205 Bore 15 and 2 other compatible models.

It replaces selected OEM reference numbers including 27-83940, 27-83940M, 682-12414-00-00, 682-12414-A1-00, 83940M, S18-0380 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: 555-119
• Product: Gasket Thermostat
• OEM Reference: 27-83940, 27-83940M, 682-12414-00-00, 682-12414-A1-00, 83940M, S18-0380
• Application: Mariner 2 Cyl 2.205 Bore 15 and 2 other compatible models

Product Fitment

This part is suitable for the following models:

• Mariner 2 Cyl 2.205 Bore 15 – All Years
• Mercury 2 Cyl 2.205 Bore 9.9 – All Years
• Yamaha – 1984-2008

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:

• Rectifier Mercury / Mariner / Yamaha 8 - 70 Hp OEM# 664-81970-60-00 – 365-1930
• Oil Seal Crankshaft Mariner / Yamaha 9.9 / 15 Hp 84-09 OEM# 26-83936M – 552-51T
• Fuel Filter Mariner / Yamaha 9.9 - 225 Hp OEM# 18-7781 – 600-279
• Carburetor Kit Mariner / Yamaha 8 - 15 Hp Without Float OEM# 18-7059 – 600-69-01

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