We ask this question way too many times, what are the model and serial numbers for both the piece of equipment and the engine? Even though Generac is not a major engine manufacturer, unless we can identify which engine you have, we can’t give you much help. Just saying “I have a 27hp engine” doesn’t help much. With unit numbers we might be able to cross reference to the engine. Also, a couple of pictures of the engine will give us a starting point.