Fault Codes/Rehlko/OVER CRANK SDRehlkoOVER CRANK SDUnclassifiedCoolingWhat This Code MeansThree unsuccessful starting attempts; Engine fails to startPossible Causes•Fuel supply issue•Faulty spark plug•Faulty battery•Loose connectionsSuggested Actions1Check the fuel supply2Check the spark plug3Check the battery4Check for loose connections5Contact an authorized distributor/dealer for serviceRelated Rehlko Fault CodesOVERCRANK FAULTOVERSPEED CONDITIONOVER CRANKOVERTEMPERATURE FAULTOSP1-13OFP1-14OCP1-15NOT IN AUTOP1-17Browse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for OVER CRANK SD on your specific Rehlko unit — cited to the OEM manual, not a forum guess.TRY IT FREE