Section 3 - On The Water
Page 44
90-899883182 NOVEMBER 2007
Propeller Selection
IMPORTANT: The engines covered in this manual are equipped with an RPM rev‑limiter
that is set to an upper RPM limit. This limit, which is slightly above the normal operating
range of the engine, helps prevent damage from excessive engine RPM. Once the RPM
returns to the recommended operating RPM range, normal engine operation resumes.
The boat manufacturer and the selling dealer are responsible for equipping the power
package with the correct propeller. Refer to Mercury Marine's web page
http://
www.mercurymarine.com/everything_you_need_to_know_about_propellers6
.
Select a propeller that will allow the engine power package to operate at or near the top
end of the recommended WOT operating RPM range with a normal load.
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 wide‑open throttle (WOT) is permissible (5 minutes at a time maximum).
• Avoid WOT acceleration from idle speed.
• Do not operate at WOT 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.
After the Break‑In Period
To help extend the life of your Mercury MerCruiser power package, the following
recommendations should be considered;
• Ensure that propeller allows the engine to operate at or near the top of the specified
WOT RPM range (Refer to the
Specifications
and
Maintenance
sections) when at
full throttle with a normal boat load.
Summary of Contents for Vazer 100
Page 8: ...Page iv 90 899883182 NOVEMBER 2007 ...
Page 26: ...Section 1 Warranty Notes Page 18 90 899883182 NOVEMBER 2007 ...
Page 40: ...Section 2 Getting to Know Your Power Package Notes Page 32 90 899883182 NOVEMBER 2007 ...
Page 54: ...Section 3 On The Water Notes Page 46 90 899883182 NOVEMBER 2007 ...
Page 60: ...Section 4 Specifications Notes Page 52 90 899883182 NOVEMBER 2007 ...
Page 114: ...Section 7 Troubleshooting Notes Page 106 90 899883182 NOVEMBER 2007 ...
