Not a bad idea . Typical charter engine damage is overheating or running low on oil. A good Engineer who know your engine will spot it fast .In general Marine engines are very robust. At 3000 hrs you should have plenty of life left. I have 9000 hours on a 4 cyclinder Cummins and 13,000 hours on a MTU six cylinder. No problems.
See AlsoHow to Change the Oil in Your Yanmar SA Series Tractor110 Years of Yanmar HistoryOur Mission｜About YANMAR｜YANMARThe wear out, service items at 3000 hs would be the equipment bolted onto the engine.... alternators, starters, pumps, exhaust, fuel lift pumps, injectors, heat exchangers coolers, couplings, hoses ....... These are normal maintenance, service issues for a 3000 hr marine engine .
In Croatia they have talented diesel engineers and the price is good. .
