smlrangerExplorerFeb 23, 2014Onan genset, overheat after coolant changeI just did a cooling system drain, flush and refill on my 10KW Onan generator. I followed the procedure in the manual precisely. I was also able to get all of the required 6 guarts of new coolant ba...Show More
John_S_Explorer IIFeb 23, 2014Yup sounds like air trapped. Do you have a IR temp gun. Run the beam over the radiator and see if there is a temp differential.