Mercury MERCRUISER - Getting Started; 20-Hour Break-In Period; Launching and Boat Operation; Operation Chart

Section 3 - On the Water
Page 40 90-899883295 JUNE 2008
If full‑throttle operation is below the recommended range, the propeller must be changed
to prevent loss of performance and possible engine damage. On the other hand, operating
an engine above the recommended operating RPM range will cause higher than normal
wear and damage.
After initial propeller selection, the following common problems may require that the
propeller be changed to a lower pitch.
• Warmer weather and greater humidity cause a loss of RPM.
• Operating in a higher elevation causes a loss of RPM.
• Operating with a dirty boat bottom causes a loss of RPM.
• Operating with increased load (additional passengers, pulling skiers) causes a loss of
RPM.
For better acceleration, such as is needed for water skiing, use the next lower pitch
propeller. When not pulling skiers, do not operate at full throttle when using the lower pitch
propeller.
Getting Started
20‑Hour Break‑In Period
IMPORTANT: The first 20 hours of operation is the engine break‑in period. Correct break‑in
is essential to obtain minimum oil consumption and maximum engine performance. During
this break‑in period, the following rules must be observed:
• Do not operate below 1500 RPM for extended periods of time for the first 10 hours.
Shift into gear as soon as possible after starting and advance the throttle above 1500
rpm if conditions permit safe operation.
• Do not operate at one speed consistently for extended periods.
• Do not exceed 3/4 throttle during the first 10 hours. During the next 10 hours, occasional
operation at full throttle is permissible (5 minutes at a time maximum).
• Avoid full throttle acceleration from idle speed.
• Do not operate at full throttle until the engine reaches normal operating temperature.
• Frequently check engine oil level. Add oil as needed. It is normal for oil consumption
to be high during the break‑in period.
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.
Open engine hatch.
Check for fuel, oil,
water, fluid and
exhaust leaks.
Listen for the audio
alarm.
Turn battery switch to the
"OFF" position.