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Brand Part Number Notes Yamaha 90430-08003-00 Current OEM part
based on the provided compatibility data
The best way to ensure a match is to cross-reference the part number printed on your old belt
Mark the positions for the four mounting holes on the plate
It is engineered to restore cooling system performance and prevent engine overheating
Marine Thermostat – Fits Yamaha F300/F350 4-Stroke V8 (Replaces 6AW-12411-00-00, 18-3634) 140-370HP Brand Part Number Notes YamahaProduct Details This is a direct replacement Marine Thermostat for Yamaha F300 F350 4 Stroke V8 Outboards, specifically designed to fit 300HP and 350HP V8 engines manufactured between 2007 and 2018. It maintains the correct engine operating temperature for optimal performance and fuel efficiency. It serves as a direct replacement for Yamaha part number 6AW 12411 00 00 and Sierra part number 18 3634. Engineered for direct OEM replacement fitment.
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