There may come a time when repowering your cherished sailboat needs to be addressed. I suspected that not all 13 horses of the venerable Volvo MD7A two-cylinder diesel in our 1978 Islander Bahama 30 were performing anymore. Those that were tended to overheat. Cleaning internal passages had been undertaken a number of times, but the internal corrosion caused by saltwater cooling had taken its toll. A total rebuild was an option I considered but rejected. Sailing buddies had taken that route and continued to have problems with their older engines.
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