Radiator

Heat exchanger
Manufacturer: Yanmar
Part number: 128990-4440

Heat Exchanger O-rings
Manufacturer: Yanmar
Part number: 128990-44100
Description: O RING D65.6 X 3.53
Quantity: 4

Radiator Cap
Manufacturer: Yanmar
Part number:129673-44131
Obsolete part number:128990-44130
Description: CAP 0.95 BAR

Coolant
Manufacturer: Yanmar
Part number: YAN129671-00300
Specifications: Yanmar UltraLife Coolant YG30 or an equivalent ASTM D3306
Coolant capacity: 4.3L
Change interval: Every 2 years

Heat Exchanger Cleaning
It is critical to flush the engine with fresh water before a period of inactivity.
Pacwest in San Diego does NOT recommend cleaning the raw water system with Barnacle buster or other products because frequently this will lead to a pre-mature failure of the tubing inside of the heat exchanger.