Ensure your marine diesel engine's reliability with a professional engine survey from SB Marine Mechanic. Our expert team provides detailed. Family owned and operated business with over 30years of marine engine experience. at 17 joined the U.S. Navy were i was trained at engine-man A-school on various Detroit Diesels 671, 12V71, 892, after being discharged in 1985 i was looking for... https://www.sbmarinemechanic.com/marine-diesel-engine-survey-2/