What is the spark plug gap for onan 4000 generator.
Up to20%cash back · I have Onan 4000 generator that won't start changed fuel pump , spark plug, fuel filter engine will turn over and will prime but starving for gas … read more. Hank F. Service Technician. High School or GED. 1,541 satisfied customers. I have a 1987 komfort motor home with a Onan generator I.
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