Appropriate Cost of Engine Service

You could get a quote from http://www.jasmarine.com/. I use them and they come to my boat in Miami Beach. They discriminate the service cost from travel time, this should help you decide it is worth moving the boat.

Call Fordham marine in Jacksonville. Best Volvo shop period.....

Travel time is going to be the killer. But sounds to me like that quote is right in the ballpark if cleaning heat exchangers, aftercoolers,setting valve lash etc. It's been a long time since I've done a D6 service, but I remember the filters being outrageous and lots of them. Off the top of my head 3 oil filters per engine at about $80 each, 2 fuel filters at around $80 each. etc. etc. Jaz in Fort Lauderdale can give you an estimate, but I can tell you this.....the fuel burned to get it there is not going to be worth it. Now Jacksonville might be worth it, but still a day of your time to get it there and back......if it's an hour drive each way for the mechanics then it might be worth it.

I have 2 of the D6, but the 370 hp models. Mine are still under the warranty, so I can't touch them. That number sounds about right. Maintaining the greeen monsters is not cheap.

It's probably on your list for all heat exchangers but I would do them all if any doubts, especially the fuel coolers.

I am going to hit them with Rydlyme one of these days.

Please put any chemical treatment off till absolutely necessary.
The coatings the mfg's apply are thin and will wear quicker with acids. Like our old outboards, flushes are required from time to time to rinse out the silt.
Clean water operation is the best, when operating in silt laden water, rinse more often. Always keep zincs up where required.
I have learned thru many years, cooperiours-nickel fails to Barnical buster.

It maybe a little high but if it means taking off the aftercoolers to clean them plus changing some hoses... it's not bad assuming the guy doing it does a good job