4. Disassembly and reassembly774.3 Disassembly and reassembly4.3.1 Disassembly• Preparation on a boatFor engines mounted in an engine room of a ship, remove the piping and wiring connecting them to theship.1) Remove the remote control cable (from engine and marine gearbox).2) Unplug the extension cord for the instrument panel from the engine.3) Remove the wiring between the starting motor and the battery.4) Remove the exhaust rubber hose from the mixing elbow.5) Remove the rubber hose connecting the coolant recovery tank to the filler cap.6) Remove the seawater inlet hose for the seawater pump (after making sure the seacock is closed).7) Remove the fuel oil inlet rubber hose from the fuel feed pump.8) Remove the body fit (reamer) bolts and disassemble the propeller shaft coupling and thrust shaftcoupling.9) If a driven coupling is mounted to the front drive coupling, disassemble.10) Remove the flexible mount nut, lift the engine, and remove it from the engine base.(Leave the flexible mount attached to the engine base.)• Disassembling an engine in a workshop(1) Drain cooling waterRefer to 2.2.5(6).1) Open a seawater drain cock to drain the seawater.2) Open a drain cock on the cylinder body to drain the fresh water from the cylinder head and cylinderbody.3) Open a fresh water drain cock on the lower part of the coolant tank to drain the fresh water.4) Open a fresh water drain cock on the lower part of the fresh water pump to drain the fresh water.(2) Drain lube oil1) Remove the pipe coupling bolt, which holds the lube oil dipstick guide, and drain the lube oil fromthe engine.2) Remove the drain plug on the lower part of the crank case control side, and drain the lube oil fromthe marine gearbox.Coolant tankFresh waterpumpSeawater pumpDrain cock for seawater Drain cock for coolant Drain cock for seawaterCoolant tank
