Marine Diesel Engine Market is projected to grow from USD 5.40 billion in 2025 to USD 8.95 billion by 2036, at a CAGR of 4.7%. Medium Speed will dominate with a 45.7% technology share, while Merchant will dominate with a 38.6% application share, and 1,000 - 5,000 HP will dominate with a 41.2% power share.