70132 Mercury WASHER, WATER JACKET COVER FASTENING SCREW

Walk-Around Inspection
For any type of leak (coolant, lube, or fuel) clean up the fluid. If leaking is observed, find the source and correct the leak. If leaking is suspected, check the fluid levels more often than recommended until the leak is found or fixed, or until the suspicion of a leak is proved to be unwarranted.
To obtain maximum service life for your engine, make a thorough inspection before starting the engine. Perform a walk-around inspection of the installation. Look for the following:
Oil, fuel, or coolant leaks
Loose bolts or missing bolts
Remove any trash that has built up.
The guards must be in the proper place. Repair damaged guards or replace missing guards.
Ensure that the areas around the rotating parts are clear.Make any necessary repairs.Cooling System
Illustration 1 g00747602
Top view (1) Location of the vent valves for the aftercooler and oil cooler system (2) Location of the vent valves for the jacket water system (AA) Vent valve
Make sure that vent valves (1) and (2) are open.
Inspect the cooling system for leaks or loose connections. Inspect the condition of all the pipes for the cooling system. Ensure that the connections are properly clamped.
Inspect the water pumps for evidence of leaks.
Check the coolant level. Add coolant, if necessary. For information on the proper coolant to use, see this Operation and Maintenance Manual, "Refill Capacities and Recommendations" (Maintenance Section).Lubrication System
Illustration 2 g00745027
(1) "ADD" mark (2) "FULL" mark
Check the engine crankcase oil level. While the prelube pump is on, maintain the oil level between the "ADD" and "FULL " marks on the oil level gauge. For information on the proper oil to use, see this Operation and Maintenance Manual, "Refill Capacities and Recommendations" (Maintenance Section).
Check for leaks at the following components: crankshaft seals, crankcase, oil filters, oil gallery plugs, sensors and valve covers.
Inspect the tubes, tee pieces, and clamps on the crankcase breathers.Air Inlet System
Ensure that the air inlet piping and the air filters are in place.
Ensure that all clamps and connections are secure.Fuel System
All valves in the fuel return line must be open before and during engine operation to help prevent high fuel pressure. High fuel pressure may cause filter housing failure or other damage.
Open all fuel supply lines and fuel return lines.
Inspect the fuel lines for loose fittings and leaks. Ensure that the fuel lines are properly clamped.
Check the fuel supply. Keep fuel tanks nearly full. Partially filled tanks will collect moisture. Do not overfill the fuel tank. When fuel is warm, fuel expands and the fuel may overflow.
Drain water and sediment from the fuel tank.
Drain water from the primary filter/water separators.Starting System
Ensure that the engine control system allows the engine to be started from the local position.
Ensure that the engine will be started at low idle rpm.
Illustration 3 g00708195
(1) Lubricator (2) Air supply valve
Be sure that the barring device is fully disengaged.
Drain moisture and sediment from the air tank and from any other air piping.
Check the oil level in lubricator (1). Keep the lubricator at least half full. Add oil, if necessary. Use SAE10W oil for temperatures that are greater than 0 °C (32 °F). Use air tool oil for temperatures that are below 0 °C (32 °F).
Check the air pressure for starting. Open air supply valve (2) .Note: If the engine is equipped with a system for external support, prepare the system before starting the engine. Perform all prestart checks for the control system. Prepare the governor and the actuator, if necessary.Purge the Cylinders
Note: This procedure is necessary when the engine has been shutdown for more than six hours.
Illustration 4 g00745028
Manual valve (1) Cap nut (2) Valve cock
Fluids may escape from the cylinder pressure valves at high velocity during this procedure and cause personal injury. Always stay clear and keep personnel away from the cylinder pressure valves during this procedure.
Remove cap nuts (1). Turn valve cocks (2) counterclockwise for 1 1/2 revolutions.
Ensure that the "FUEL CONTROL ON/OFF" switch is in the "OFF" position.
Turn the "PRELUBE/START" switch to the "PRELUBE" position. When the "PRELUBE" indicator illuminates, turn the "PRELUBE/START" switch to the "START" position in order to rotate the crankshaft for a few revolutions.
Inspect all of the outlets of the manual valves for indications of fluid.If fluid is found, do not continue the start-up. Inform the maintenance personnel. Record the cylinder number, the engine serial number, and the service hours.If no signs of fluid discharge are found, ensure that all of the manual valves and the cap nuts are clean. Tighten valve cocks (2) to 24 3 N m (18 2 lb ft). Install cap nuts (1) and tighten to 17 3 N m (13 2 lb ft).