Suzuki DF 40 Service Manual page 252

PROPELLER SHAFT / BEARING HOUSING
Assemble the propeller shaft in the following sequence :
forward thrust washer
, reverse gear back-up shim
.
99000-25160 : Water Resistant Grease
99000-22540 : Suzuki Outboard Motor Gear Oil
Using special tools, install the propeller shaft and housing as-
sembly in the gear case.
09922-59410 : Propeller shaft housing installer
09922-59420 : Housing Installer Handle
When the housing is fully seated, tighten both retaining bolts to
the specified torque.
Bearing housing bolt : 17 N . m (1.7 kg-m, 12.3 lb.-ft.)
RECHECKING DRIVESHAFT THRUST PLAY
Recheck the driveshaft thrust play.
This should not be less than previously checked. If less, reduce
the number / thickness of reverse gear back-up shims.
09951-09510 : Gear adjusting gauge
, reverse thrust washer
and propeller shaft housing
, reverse gear
LOWER UNIT 9-18