Cummins/Onan EH65V Engine Engine

• Unit Starts And Runs, Then Stops When The Start Switch Is Released
  Cause: Low fluid levels, Possible overheating, Other functional problem
  Fix: Check & bring all fluids up to the appropriate levels, Check for blocked air flow or other possible causes of overheating, Contact an Cummins Onan Authorized RV Service & Parts Dealer
• Unit Runs Then Surges
  Cause: Loose or worn spark plug leads, Defective ignition coil, wiring, or control components, Faulty spark plug, Governor out of adjustment, Combustion air pre-heat malfunction, Carburetor icing, Carburetor varnishing
  Fix: Check spark plug leads at spark plug & ignition coil, Contact an Cummins Onan Authorized RV Service & Parts Dealer, Remove spark plug & clean or replace, Contact an Cummins Onan Authorized RV Service & Parts Dealer, Contact an Cummins Onan Authorized RV Service & Parts Dealer, Contact an Cummins Onan Authorized RV Service & Parts Dealer
• Unit Runs Then Stops, Or Stops When Driving Around A Corner
  Cause: Low fuel level, Low oil level, Excess oil
  Fix: Add fuel, Add oil, Reduce engine oil level
• Fails To Crank
  Cause: Low battery, Bad battery connection, Blown fuse
  Fix: Check battery fluid level, Clean & tighten all battery & cable connections, Replace fuse on control panel
• Exhausting Black Smoke
  Cause: Dirty air filter
  Fix: Replace air filter
• Cranks But Won’t Start
  Cause: Fuel below generator pickup level in tank, Fuel supply shutoff valve closed, Carbon deposits on spark plug(s), Low oil level
  Fix: Add fuel, Fully open fuel supply valve, Remove spark plug(s) and replace, Add oil
• Circuit Breaker Trips
  Cause: Overloaded circuit
  Fix: Turn-off some of the electrical load, and reset the circuit breaker

Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan EH65V.

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