Forward Gear And Reverse Gear Inspection - Mercury 15 EFI FourStroke Service Manual

Gear Housing (2.15:1)
Driveshaft Holding Tool
2. Remove the driveshaft from the gearcase. Retain the shims located above the upper driveshaft bearing.
b
3. Inspect the pinion gear teeth for breakage, rust, chipping, or excessive wear.
4. If the pinion gear teeth are damaged, inspect the forward and reverse gears for damage.

Forward Gear and Reverse Gear Inspection

1. Inspect the forward gear and the reverse gear teeth for breakage, rust, chipping, and excessive wear.
NOTE: Do not remove the forward gear and bearing assembly from the gearcase unless replacement is necessary. The
removal process will damage the bearing and forward gear bushing.
2. Inspect the forward gear ball bearing for roughness or excessive wear.
3. If the bearing is in serviceable condition, do not remove the bearing from the gearcase. The removal process may damage
the bearing and forward gear bushing.
Page 6A-22
a
c
65058
a
a - Pinion gear teeth
6616
a
6697
© 2018 Mercury Marine
a - Driveshaft
b - Shims (retained)
c - Upper driveshaft bearing
a - Forward gear
91‑804762
90-8M0125265 eng NOVEMBER 2017