Volvo Penta D,F Duo-Prop Wrench

From the Volvo manual:

Propeller replacement — DP-S
Removing the propeller

This procedure requires you to use a special tool, Volvo PentaP/N 3855516.
1. Ignition switch must be OFF.
2. Make sure the remote control is in FORWARD to lock
the propeller shaft.
3. Remove the rear propeller nut.
4. Remove the rear propeller.
5. Change the remote control position to REVERSE to lock
the propeller shaft.
6. Remove the front propeller nut.
7. Remove the front propeller.
8. Wipe the propeller shaft clean. Inspect for fishing line;
remove if present.


Installing the propeller
CAUTION!
Failure to install all components could result in loss
of the propeller and damage to the drive unit the
next time the boat is operated.
1. Ignition switch must be OFF.
2. Make sure the remote control is in FORWARD.
3. Coat the full length of the propeller shaft and the inside of the propeller hub with Volvo Penta propeller shaft grease P/N 828250. (Removal of the propeller will be difficult if this is not done.)
4. Install the front propeller.
5. Install the front propeller nut and tighten it to 45 ft. lb. (60N·m).
6. Shift the remote control into REVERSE to lock the propeller shaft.
7. Install the rear propeller.
8. Install the rear propeller nut and tighten it to 50 ft. lb. (70 N·m).
9. Shift the remote control into NEUTRAL. The propeller should turn freely.