06-08-2016, 06:13 AM
Clarke has given a very good explanation. Most of the rebuilt engines I ran across were from overheating. Failing to replace old water hoses can also lead to a catastrophic failure if one breaks while climbing a hill. Lack of maintenance and lack of knowledge of how to drive a Detroit 2-stroke are the two primary causes but stuff does happen occasionally even when you are doing everything right. My 8V92TA has over 171,000 miles and is running fine.