Service - 90 XT855 Operator’s Manual p 400 Hour 400 Hour Replace Fuel Filter Replace fuel filter every 400 hours. 1. Remove filter. CMW ment and replace with a fuel over the gasket and n pump. (See engine Fluid and Filter and change filter (4) HF at fill (1) until oil level ht glass (2). Change hours if jobsite 0°F (38°C) more than