This starter assembly is compatible with models 66T-15710-00 and 66T-15710-01 and is designed for use with 40HP 2-stroke outboard motors, including E40XMH and 40XWT.Constructed with metal components, it supports in marine environments.The assembly provides consistent starting performance and is engineered for straightforward installation as a direct replacement.It is built to withstand operational heat and vibration typical in marine applications and meets applicable performance specifications for stable function.