Sea Ray 290 Sundancer Manuale del Proprietario Scaricare il pdf (Pagina 62)

SECTION 4 • BILGE & UNDERWATER GEAR

4.4

290 Sundancer

E. PROPELLER REMOVAL AND INSTALLATION

1. Shut off engine, remove key, shift into neutral

and put tape over ignition switch key slot.

IMPORTANT: Correct rotation propeller MUST

match direction or rotation of propeller shaft.

2. Remove Propeller shaft anode and rear prop nut.

Pull the propeller straight off the shaft. Remove

the rear thrust washer that is behind the rear

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.

3. Remove the front prop nut, propeller and thrust

washer in the same manner.

4. Coat the propeller shaft with an anti-seize

lubricant.

5. Slide front thrust hub onto propeller shaft, with

tapered side toward propeller hub.

6. Align splines and place front propeller on

propeller shaft.

7. Install front prop nut and torque. (Refer to drive

owners manual for speciﬁ c torque value.)

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.

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.

! WARNING

Place a block of wood between the anti-ventilation

plate and propeller to protect hands from propeller

blades and to prevent propeller from turning when

tightening propeller nut.

! WARNING

D. P

ROPELLER SELECTION

IMPORTANT: Installed propeller must allow

engine to operate at its speciﬁ ed maximum

WOT (wide open throttle) RPM. Use an accurate

service tachometer to verify 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. Speciﬁ ed engine WOT

and operating RPM range are listed in the Mercury

MerCruiser Operation, Maintenance and Warranty

Manual attached to the engine.

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/or 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 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.

If you strike a submerged object, STOP THE

ENGINE as soon as possible and examine the

stern drive unit for damage. Even if no damage is

visible, there could be internal problems or difﬁ culty

maneuvering. If you must use the boat after impact,

run at the lowest speed possible.

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Sea Ray 290 Sundancer Manuale del Proprietario Pagina 62

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