mecruiser twin inboard matched set cw/ccw 454/340 hp with trans velvet drive ratio 1.91.1. hrs known 368.5 fresh water cooled .both transmisions have been resealed professionally .Both heatexchangers serviced all new end cover seals and zinces ,bothe engs fully serviced resently new belts ,spark plugs,filters fuel and oil ,eng oil and trans oil new .port eng has new raw water pump.new eng oil cooler .All Exhust risers new OEM merc not aftermarket .All hoses and clamps good operation condition .