Sea Ray 175 Sport Owner's Manual page 57

S
ECTION
4. P S
ROPELLER ELECTION
IMPORTANT: Installed propeller must allow
engine to operate at its specified maximum
WOT (wide open throttle) rpm.
a c c u r a t e s e r v i c e t a c h o m e t e r t o v e r i f y
engine operating rpm.
It is the responsibility of the boat manufacturer
and/or the selling dealer to equip the power
package with the correct propeller. Refer to
Quicksilver publication - Everything You Need
To Know About Propellers P/N 90-8614492.
Specified engine WOT and operating rpm range
are listed in the Mercury MerCruiser Operation,
Maintenance and Warranty Manual attached to
the engine.
I f f u l l t h r o t t l e o p e r a t i o n i s b e l o w t h e
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/or damage.
After initial propeller selection, the following
c o m m o n p r o b l e m s m a y r e q u i r e t h a t t h e
propeller be changed to a lower pitch:
• Warmer weather and greater humidity
cause an rpm loss.
• Operating in a higher elevation causes an
rpm loss.
• Operating with increased load (additional
passengers, pulling skiers, etc.).
For better acceleration, such as is needed for
water skiing, use the next lower pitch propeller.
However, do NOT operate at full throttle when
using the lower pitch propeller but not pulling
skiers.
Because of the many variables of boat design,
only testing will determine the best propeller
for a particular application. Available propellers
are listed in the Mercury Precision Parts /
Quicksilver Accessories Guide.
4.4
4 • B & U
ILGE
Use an
NDERWATER
5. P R
ROPELLER EMOVAL AND
! WARNING
If engine is started during propeller maintenance,
serious personal injury can occur.
Shut off engine, remove key, shift into neutral, and
put tape over ignition switch key slot.
a. Shut off engine, remove key, shift into neutral
and put tape over ignition switch key slot.
b. Straighten the bent tabs on the propeller nut
retainer (Figure 4.4.1).
P
(F . 4.4.1)
SECURING TABS
c. Place a block of wood between the gear case
and propeller to stop propeller from rotating and
remove propeller nut (Figure 4.4.2).
P
(F . 4.4.2)
d. Remove the propeller nut retainer, the thrust hub
and the continuity washer (Figure 4.5.1) and put
them in a secure place. Pull the propeller straight
off the shaft. Remove the thrust washer that is
behind the propeller. If the propeller is seized to
the shaft and cannot be removed by hand,
special tools are needed. Have the propeller
removed by an authorized dealer or trained
mechanic.
G
EAR
I
NSTALLATION
GEAR CASE
WOOD BLOCK
175 Sport