I don't have an answer for your question, but I have a question for you, or maybe helpful info. How long have you had the 460 with the Cobra o/d ? I had a 24 ft Liberator with a Cobra outdrive. The first season I had it, I blew the outdrive 3 times. After the 3rd time, the dealer didn't want to honor my waranty ( I bought the boat used from a dealer and they gave me a 1 year warranty- pretty cool of them). It took my father and about 15 other bikers pulling up to the shop to "convince" them to honor the warranty. It turned out that the OMC Cobra ( stock ), couldn't handle the "stock" HP from the 460. After some upgrades, all problems were gone. I'm embarassed to say that I don't recall what the upgrades were, but do some research if you're not familiar with the Cobra. I hope this is helpful to you.