Thermostat - Yamaha 300 / 350 HP 4 - Stroke (2007-2021) OEM# 6AW-12411-00-00 | WSM 775-225

Thermostat Yamaha 300 / 350 Hp 4-Stroke OEM# 6AW-12411-00-00

This WSM thermostat is a quality aftermarket replacement part designed for Yamaha 8 Cyl 4 Stroke 5.3L 300 and 1 other compatible model.

It replaces selected OEM reference numbers including 6AW-12411-00-00, S18-3634 and is suitable for service, repair and rebuild work.

Key Features

• Quality aftermarket replacement part from WSM
• Engineered for dependable fit, function and service life
• Designed for marine and powersports repair and maintenance
• Compatible with 18 listed fitments
• Replaces selected OEM reference numbers listed below

Product Details

• Brand: WSM
• WSM Part Number: 775-225
• Product: Thermostat
• OEM Reference: 6AW-12411-00-00, S18-3634
• Application: Yamaha 8 Cyl 4 Stroke 5.3L 300 and 1 other compatible model

Product Fitment

This part is suitable for the following models:

• Yamaha 8 Cyl 4 Stroke 5.3L 300 – 2007
• Yamaha 8 Cyl 4 Stroke 5.3L 300 – 2008
• Yamaha 8 Cyl 4 Stroke 5.3L 300 – 2009
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2007
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2008
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2009
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2010
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2011
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2012
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2013
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2014
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2015
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2016
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2017
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2018
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2019
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2020
• Yamaha 8 Cyl 4 Stroke 5.3L 350 – 2021

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:

• Starter Solenoid Yamaha 30 / 40 / 300 / 350 Hp 4-Stroke 07-22 OEM# 6AW-8194A-00-00 – 004-127
• Oil Filter Yamaha 200 - 350 Hp 4-Stroke 07-22 OEM# 18-7954 – 615-107
• Water Pump Impeller Yamaha 300 / 350 Hp 4-Stroke OEM# 18-8925 – 700-450
• Water Pump Service Kit Yamaha 300 / 350 Hp 4-Stroke OEM# 6AW-W0078-00-00 – 725-450

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