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MerCruiser 350 MAG MPI Owner's Manual

MerCruiser 350 MAG MPI
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Section 3 - On The Water
Page 40 90-864197070 JUNE 2007
NOTICE
Shifting into gear at engine speeds above idle will damage the gearcase. Shifting into
gear when the engine is not running can cause misalign the clutch, preventing proper
shifting. Always shift the gearcase into gear when the engine is operating at idle. If you
must shift while the engine is not operating, rotate the propeller shaft in the appropriate
direction during shifting.
STOPPING THE ENGINE
1. Move the remote control handle to neutral/idle and allow the engine to slow to idle
speed. If engine has been operated at high speed for a long period of time, allow the
engine to cool at idle speed for 3 to 5 minutes.
2. Turn ignition key to the "OFF" position.
Throttle Only Operation
1. Refer to Remote Controls section for remote control features.
2. Move the control lever to the idle/neutral position.
3. Depress and hold the throttle only button, and move the control lever to the idle/forward
or idle/reverse position.
4. Advancing the control lever beyond the idle/forward or idle/reverse position will cause
engine speed to increase.
IMPORTANT: Moving the control lever back to the idle/neutral position will disengage the
throttle only button and allow the engine to shift into gear.
5. Throttle only mode is deactivated by moving the control lever to the idle/neutral position.
Moving the control lever from the idle/neutral position to the idle/forward or idle/reverse
position without pressing the throttle only button will shift the unit into the chosen gear.
Freezing Temperature Operation
IMPORTANT: If the boat is operated during periods of freezing temperature, precautions
must be taken to prevent freeze damage to the power package. Damage caused by
freezing is not covered by Mercury MerCruiser Limited Warranty.
Drain Plug and Bilge Pump
The engine compartment in your boat is a natural place for water to collect. For this reason,
boats are normally equipped with a drain plug and/or a bilge pump. It is very important to
check these items on a regular basis to ensure that the water level does not come into
contact with your power package. Components on your engine will be damaged if
submerged. Damage caused by submersion is not covered by the Mercury MerCruiser
Limited Warranty.
Basic Boat Operation (DTS Models)
Launching and Boat Operation
IMPORTANT: Install bilge drain plug prior to launching boat.
OPERATION CHART
Operation Chart
BEFORE STARTING AFTER STARTING WHILE UNDERWAY AFTER STOPPING
Install bilge drain plug.
Observe all gauges to
check condition of
engine. If not normal, stop
engine.
Observe all gauges to
check condition of engine. If
not normal, stop engine.
Turn ignition key to the
"OFF" position.

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MerCruiser 350 MAG MPI Specifications

General IconGeneral
Engine TypeV8
Horsepower300 HP
Ignition SystemElectronic ignition
Alternator65 amp
Compression Ratio9.4:1
Displacement5.7L (350 cu in)
Fuel SystemMulti-Point Injection (MPI)
Bore x Stroke4.00" x 3.48" (101.6mm x 88.39mm)

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