2007 44 Sundancer purchase

I am in the process of purchasing a 2007 44 Sundancer QSC 500 1150 Hrs.. Survey is scheduled this week what should I expect to see regarding wide open rpm and what is the average speed expected at full throttle. Any input as to what to seek out during the survey is greatly appreciated.Thanks

Good luck with purchase... you might find some information here:
http://www.clubsearay.com/index.php?threads/official-450da-owners-thread.81076/
http://www.clubsearay.com/index.php?threads/official-450da-owners-thread.87185/

and here:
http://www.clubsearay.com/index.php?threads/official-cummins-qsc-500-thread.47619/

Check the engine tag, it is probably rated at 2600 but there were a few 2500 engines produced. You should see 2675 if they are rated at 2600. I have had a 2005 420 and a 2006 44 and have needed to reduce the pitch on both to get into the Cummins recommended prop curve.

There is another quick check you can do through the Smart Craft. Scroll through the propulsion section to the air intake temp. section. You should see air intake temps within 20 degrees of the sea water temp. This will give a quick indication of the shape of the after coolers. If the intake air is not being cooled they will need work. Last week I was getting intake air readings in the 80's as the sea water temp in Fort Myers is around 67.

I hope you are getting an engine survey by a Cummins mechanic.

Good luck with the purchase, the 44 with the QSC's is a great boat. I rate it Searay's best design of all.

It will likely be that the rated rpm is 2600 so at full throttle ideally you would get to 2675 rpm at 95% load or lower. If the previous owners haven't changed pitch you will likely not get anywhere near those numbers.

I don't run at full throttle enough to know for sure, but my guess is speed is around 30kts but its really irrelevant to engine health. The more important numbers are the max rpm and load (or fuel burn). Cruise is around 22kts at 2200 rpm, 24kts at 2350.

You should ask to see proof the aftercoolers have been serviced (which means removed from engine, torn apart, cleaned and reassembled with grease) in at least the last 2-3 years unless the boat is 100% freshwater. If they cannot prove it to you assume you will at least need to do the full seawater service, plan on $500-$1,000 in parts (mostly gaskets) and 8-12 hours labor per engine, that would include servicing the aftercoolers, fuel/gear cooler and heat exchangers. I have seen shop estimates as high as $5,000 per engine. If the boat is salt water and its never been done plan on having to replace both aftercoolers at approximately $2500 each plus all the labor. Even new ones must be pulled apart and greased, cummins does not ship them that way.

The only other common 2007 44DA issue is that many of the hoses in the engine room are likely toast and should be replaced if they are original. Head hoses, sea water supply for mains, generator, and AC have all been replaced.

Plenty of info in the threads linked above - good luck its a fantastic boat!

Thanks for the feedback the boat was in fresh water since new.Just came South in October of 18.I still plan on having the coolers and heat exchanges serviced.

Congrats!

MM

Just to follow up survey went well. A couple of issues cutlass bearings, a few hoses the boat ran well will need to work props 2640 wide open.Waiting for oil results. Hopefully close deal this week/

Nice!

What fuel burn or load did you have at WOT?