Detroit Diesel 12V92 Marine Engine – 750 HP. This used Detroit Diesel 12V92 marine engine is available in ready stock at Narayan Marine Tech Pvt Ltd. It is rated at 750 HP. Technical details: Make – Detroit Diesel Engine – 12V92 Model – 81237416 Power – 750 HP Application – Marine Engine. The price shown is indicative only. The actual price may vary depending on market conditions, availability and the final specifications at the time of order.