Cummins/Onan OHV Engine

How to read your Cummins/Onan engine serial & model number →

• When No Electricity Is Generated at Receptacle
  Fix: Check if AC circuit breaker is in the "ON" position. Check AC receptacle and DC terminals for loose connection. Check to see if engine starting was attempted with appliances already connected to generator.
• When Engine Fails to Start
  Fix: Check if choke lever is in its proper position. Check if fuel cock is open. Check fuel level. Check to make sure generator is not connected to an appliance. Check spark plug for loose spark plug cap. Check spark plug for contamination. Check if engine switch is in OFF. Set the choke lever to "CLOSE" position. If closed, open fuel cock. If empty, refill fuel tank making sure not to overfill. If connected, turn off the power switch on the connected appliance and unplug. If loose, push spark plug cap back into place. Remove spark plug and clean electrode. Turn engine switch to ON.
• Low power
  Fix: Carbon brushes are excessively worn

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan OHV.

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.