Kubota standby generator is leaking coolant under the unit or around the radiator area during or after operation.

Safety first: Allow the engine to cool completely before touching any cooling system components. Hot coolant is dangerous.

• Locate leak source: Visually inspect hoses, clamps, radiator, and water pump area for wet spots or dried coolant residue. Use a flashlight and mirror if needed.
• Tighten clamps: Gently tighten any loose hose clamps on upper and lower radiator hoses and heater hoses (if equipped). Do not overtighten plastic fittings.
• Replace damaged hoses: If a hose is cracked, bulging, or soft, drain coolant to below that level and replace the hose with a Kubota-approved part. Refill and bleed air.
• Water pump check: Look for coolant dripping from the water pump weep hole. Persistent leakage indicates a failed seal and the pump should be replaced.
• Radiator repair: If the radiator core is leaking, it may need professional repair or replacement. Do not attempt to solder or epoxy high-pressure areas without proper tools.