I have a Perkins 4108 in very good condition and runs well. This weekend we did a 13 hour motor sail up the coast and engine runs great. At the end of the trip we stopped for about 2 hours and when we restarted I had a white/bluish smoke. Engine ran good, oil presssure good, no over heating. Moved the boat to a slip and smoke level lessened while running.
Oil level is same as start of trip. Next morning started up and ran well. Slight puff of smoke at start up and the clear.
Thinking it must be fuel related and possibly an injector stuck for awhile or fuel built up.