INERY Dual main engines — 1996 Detroit Diesel, Model 12-V-71 TA Diesel powered engines driving, (2 to 1) ratio, hydraulic clutches, Model MG-514 by Twin-Disc, two (2) 32" x 30" bronze, 3-blade propeller are driven through SS-shafts — 2 1/2 " diameter. These main engines are rated at 675 horse power each.