Mercury MerCruiser 4.3 TKS, User Manual

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Section 5 - Maintenance
90-899883179 OCTOBER 2007 Page 69
3. Align splines and place propeller on propeller shaft.
4. Install spline washer and tab washer.
5. Install and torque the propeller nut.
Description Nm lb‑in. lb‑ft
Propeller nut (minimum) 81 – 60
6. Bend 3 tabs on the tab washer down into the grooves in spline washer. After the first
use, bend the 3 tabs straight and retorque the propeller nut. Bend tabs back down into
spline washer. Check propeller at least after 20 hours of operation. Do not operate with
loose propeller.
Bravo Three Propeller Removal
!
WARNING
Rotating propellers can cause serious injury or death. Never operate the boat out of the
water with a propeller installed. Before installing or removing a propeller, place the drive
unit in neutral and engage the lanyard stop switch to prevent the engine from starting.
Place a block of wood between the propeller blade and the anti‑ventilation plate.
1. Place wood block between propeller blades and anti‑ventilation plate to prevent
rotation.
2. Remove the bolt and washers securing the propeller shaft anode.
3. Remove the propeller shaft anode.
a
b
d
c
f
e
5303
a - Propeller
b - Propeller shaft nut
c - Propeller shaft anode
d - Propeller shaft anode screw
e - Flat washer
f - Star washer
4. Turn aft propeller shaft nut 37 mm (1‑7/16 in.) counterclockwise to remove nut.
5. Slide propeller and thrust hub off propeller shaft.
6. Turn front propeller shaft nut 70 mm (2‑3/4 in.) counterclockwise to remove nut.
7. Slide propeller and thrust hub off propeller shaft.