We purchased a 1980 Chris Craft Corinthian 38 two days ago. It has 454 Chevys. We had the vessel surveyed and all went well. We had to bring the boat up to our marina approx:100 miles. She ran fine for the first few hours than one engine started missing and we could not get the rpm's aboce 2400. Things progresssively got worse to the point one engine would not fire and we limped home on one engine we could not get above 1400 rpm's. Looking at the log it seems she has only been run 18 hours since 2006. I changed the fuel filters and one engine would not start right after changing the filter. Does anyone have any suggestions?