Checking The Lower Unit For Air Leakage; Checking The Propeller - SELVA MARINE Wahoo 15 Service Manual

CHK
ADJ
3. Check the oil for metal, discoloration, and
its viscosity. Check the internal parts of
the lower case if necessary.
4. Insert a gear oil tube or gear oil pump
into the drain hole and slowly fill with
gear oil until oil flows out of the check
hole and no air bubbles are visible.
Recommended gear oil:
Hypoid gear oil
API: GL-4
SAE: 90
Gear oil quantity:
3
300 cm
(10.14 US oz, 10.58 Imp oz)
5. Install new gaskets and gear oil check
screw 2, and quickly install the gear oil
drain screw 1, and then tighten them to
the specified torque.
Gear oil check screw 2 and drain
screw 1: 9 N·m (0.9 kgf·m, 6.6 ft·lb)
Checking the lower unit for air
leakage
1. Remove the gear oil check screw 1, and
then install the special service tool.
3-15
Periodic check and adjustment
Leakage tester: 90890-06840
2. Apply the specified pressure to check
that the pressure is maintained in the
lower unit for at least 10 seconds.
CAUTION:
Do not over pressurize the lower unit, oth-
erwise the oil seals can be damaged.
NOTE:
Cover the check hole with a rag when remov-
ing the special service tool from the lower
unit.
Lower unit holding pressure:
100 kPa (1.0 kgf/cm
3. If the specified pressure cannot be main-
tained, check the propeller shaft, drive
shaft, shift rod, O-rings, and oil seals for
damage. If necessary, check each shaft
for bends and damage.

Checking the propeller

1. Check the propeller blades and splines.
Replace the propeller if cracked, dam-
aged, or worn.
3
NOTE:
When replacing the propeller, see "Propeller
selection" (1-12) and select a propeller of the
same size as originally installed.
2
, 14.5 psi)
3
6AG3J11