d. Check for coolant leaks. Check the coolant hoses and connection pipes of the heat exchanger, fluid coolers,
aftercooler, water pump, and drain fittings for leaks.
4. Correct any problems found, or see your Mercury Diesel‑authorized repair facility if you are unable to determine the
problem.
Starting a Warm Engine
1. Run the engine compartment bilge blower for five minutes, or open the engine hatch to air out the bilge before attempting
to start the engine.
2. Move the remote control handle to the "NEUTRAL" position.
3. Turn the key switch to the "ON" position.
4. Turn the key switch to the "START" position and release the key when the engine starts. Verify that the charge indicator
and oil pressure warning lamps turn off.
5. Verify that the instrumentation functions properly and normal readings are indicated.
Shifting
NOTICE
Shifting into gear at engine speeds above idle will damage the transmission. Shift into gear only when the engine is operating
at idle.
1. Ensure that the remote control shift lever is in neutral.
2. Move the remote control shift lever with a firm, quick forward motion to shift to forward gear, or backward to shift to reverse.
3. After shifting, advance the throttle to the desired setting.
IMPORTANT: Avoid stopping the engine in gear. If the engine does stop in gear, the transmission may be difficult to return
the control handle to neutral. Use the following procedure if the transmission will not return to neutral.
a. Push and pull repeatedly on the remote control handle until the handle returns to the neutral detent position. This may
take several tries if the power package was operating above idle RPM when the engine stopped.
b. After the handle returns to the neutral detent position, resume normal starting procedures.
Engine Shut Down (Stopping)
1. Place the remote control lever in neutral.
NOTICE
Immediately stopping the engine after high load operation can damage the turbocharger bearings. Idle the engine for several
minutes before shutdown.
2. Operate the engine at idle speed for several minutes to allow the turbocharger and engine to cool.
3. Turn key switch to the "OFF" position.
Starting the Engine After Stopped While in Gear
IMPORTANT: Avoid stopping the engine while in gear. If the engine stop while in gear, refer to the following procedure:
1. Push and pull repeatedly on the remote control handle until the handle returns to the neutral detent position. This may take
several tries if the power package was operating above idle RPM when the engine stopped.
2. After the handle returns to the neutral detent position, resume normal starting procedures.
Freezing Temperature and Cold Weather Operation
IMPORTANT: If the boat is operated during periods of freezing temperature, take precautions to prevent freezing damage to
the power package. Damage caused by freezing is not covered by the Mercury Marine Limited Warranty.
NOTICE
Water trapped in the seawater section of the cooling system can cause corrosion or freeze damage. Drain the seawater
section of the cooling system immediately after operation or before any length of storage in freezing temperatures. If the boat
is in the water, keep the seacock closed until restarting the engine to prevent water from flowing back into the cooling system.
If the boat is not fitted with a seacock, leave the water inlet hose disconnected and plugged.
NOTE: As a precautionary measure, attach a tag to the key switch or steering wheel of the boat reminding the operator to open
the seacock or unplug and connect the water inlet hose before starting the engine.
In order to operate the engine in temperatures of 0° C (32° F) or lower, observe the following instructions:
Section 2 - On The Water
Page 20 90-8M0133568 eng JUNE 2017
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