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I am in the process of purchasing a 2003 Sea Ray 460 Sundancer, I just had the sea trial with a certified Cummins mechanic on board who had the computers hooked up to provide accurate readings during the 2-hour trip. Boat was loaded with full fuel, half water tanks, and 5 people on board, not much gear as the owner had already taken out most of his possessions.
I am including the results (PDF File) based on these readings. The broker indicated that the owner had the props redone to match the engine specificationās for required optimum fuel burn. Looking for advice if the Sea Ray is over propped as was Sea Rayās normal process to get more speed or I am OK with the current readings indicating I am in the sweet spot for cruising at 2200 to 2300 RPMās.
If over propped I still need to bring the boat from West Coast of Florida to East Coast about a 14-hour trip, what would be a good RPM range to run until I can get them re propped when I get hauled out for new bottom paint.
Thanks.
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Pictures Please
The fuel burn rates are right on the curve of the Diamond 450 at 2300. That is a static snapshot of one situation and does not give this forum enough info to help. There are ~900 hours on these engines and there is no indication of how many of those hours are with these props and how many were with the factory props. The exhaust temps at 2300 look good as well.
Please post some pictures of the turbos, aftercoolers, exhaust setup and the engine compartment in general. We need to see the discoloration on the Turbo and Aftercoolers and the piping in between to assess the amount of “Abuse” these engines may have suffered.
In my experience of looking at larger Sea Rays’ the 460 was a standout(not in a good way) in overpropping from the factory. You may have found the rare example of a 460 that had an educated owner that mitigated the root issue and then operated those engines with compassion. The only way we will have a shot at knowing is through those pictures.
If you have not yet agreed on price you can always negotiate a reduction in price to offset the head replacement that you should probably do just as a n “Insurance” for future life on these engines.
Let us know and please post some pics
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