What is the salary range of a Diesel Mechanic III?
As of August 01, 2025, the average annual salary for a Diesel Mechanic III in Castalia, OH ranges from $55,122 (25th percentile) to $65,697 (75th percentile), with a median annual salary of $60,738 and an hourly rate of $29. A Diesel Mechanic III's salary is shaped by several key factors, including experience level, specific skills, industry differences, company size, and more. Below, we'll explore how each of these influences compensation.