What should I do before servicing or performing maintenance on the Trailblazer 325?
Disconnect input power or stop the engine before installing or servicing the equipment, and follow lockout/tagout procedures according to OSHA 29 CFR 1910.147. To prevent accidental starting during servicing, disconnect the negative (−) battery cable from the battery. (Pages 5, 7)
From the official Miller Trailblazer 325 Portable Welder Generator manual, page 5
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