The yanmar 3GM30F was discontinued around the end of 2005 according to Yanmar engin identification by Toad Marine Supply, I believe it was replaced by the 3YM30 model, which is what I have in my 2009 model. Lots of information on both models can be found on line (owners manual, parts manual, and service manual) all for free. If you look up Toad Marine Supply they have a toll free number to call and will help you identify which model you have. As to which model was originally in your boat will have to be answered by the factory. Bob