Situation: A new Gen III cool fuel module is being introduced to replace the existing Gen III module. Engines with serial numbers above the range listed are equipped with the new module from the factory. The primary difference between the designs is the method of connecting the cooling water hoses to the module. Refer to the Mercury Electronic Parts Catalog (EPC) for replacement modules for engines with serial numbers above the ranges listed. For models in the defined serial number ranges listed see all of the information presented in this service bulletin.