Shimming; Selecting The Pinion Shim - SELVA MARINE Blue Whale 250 EFI Service Manual

LOWR

Shimming

NOTE:
• Shimming is not required when assembling
the original lower case and inner parts.
• Shimming is required when assembling the
original inner parts and a new lower case.
• Shimming is required when replacing the
inner part(s).

Selecting the pinion shim

1. Install the special service tool onto the
drive shaft 1.
NOTE:
• Select the shim thickness (T3) by using the
specified measurement(s) and the calcula-
tion formula.
• Install the special service tool onto the drive
shaft so that the shaft is at the center of the
hole.
• Tighten the wing nuts another 1/4 of a turn
after they contact the plate 2.
Pinion height gauge 3:
90890-06710
2. Install the pinion and pinion nut, and then
tighten the nut to the specified torque.
6-23
Lower unit
Pinion nut:
142 N·m (14.2 kgf·m, 104.7 ft·lb)
3. Measure the distance (M4) between the
special service tool and the pinion as
shown.
NOTE:
Measure the pinion at 3 points to find the dis-
tance average.
Digital caliper 4: 90890-06704
4. Turn the thrust bearing 5 2 or 3 times to
seat the drive shaft housing 6, and then
measure the housing height (M3) as
shown.
NOTE:
Measure the thrust bearing at 3 points to find
the height average.
5. Calculate the pinion shim thickness (T3)
as shown in the examples below.
6P23H11