Driveshaft Removal; Forward Gear And Reverse Gear Inspection - Mercury 25 EFI Service Manual

Gear Housing
23. Reinstall the shift shaft coupler onto the lower shift shaft.
b
a

Driveshaft Removal

1. Use the Driveshaft Holding Tool to hold the driveshaft while removing the pinion nut.
2. Remove the driveshaft from the gearcase. Retain the shims located above the upper driveshaft bearing for reinstallation.
b
Driveshaft Holding Tool
3. Inspect the pinion gear teeth for breakage, rust, chipping or excessive wear.
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4. If pinion gear teeth are damaged, inspect forward and reverse gears for damage and replace as required.
5. Remove the oil slinger tube from the gearcase.

Forward Gear and Reverse Gear Inspection

1. Inspect the forward gear and reverse gear teeth for breakage, rust, chipping, and excessive wear.
NOTE: Do not remove the forward gear race from the gearcase unless replacement is necessary.
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a -
c
b -
c -
21044
a
c
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a
a - Pinion gear teeth
a
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© 2016 Mercury Marine
Spring pin
Shift shaft bushing
Shift shaft coupler
a - Driveshaft
b - Shims
c - Upper driveshaft bearing
a - Oil slinger tube
91‑853996 14
90-8M0105568 eng MARCH 2016