Forward Gear Backlash; Propeller Shaft; Bearing Carrier - Mercury FourStroke 2.5 Service Manual

Gear Housing
Tube Ref No.
2-4-C with PTFE
95

Forward Gear Backlash

Check forward gear backlash as follows:
• Apply down pressure on the driveshaft
• Push up on the pinion gear (gear floats on the driveshaft)
• Rock the forward gear back and forth
A light clicking sound (0.050–0.152 mm [0.002–0.006 in.]) should be heard. If excessive freeplay exists (over 0.30 mm
[0.012 in.]), the gear housing components should be inspected for wear. If no freeplay exists, either the forward gear or forward
gear bearing are not seated properly in the gear housing or the lower driveshaft bearing (above the pinion gear) is positioned
too low in the driveshaft housing.

Propeller Shaft

NOTE: Verify the shift cam is aligned properly in the gear housing.
Install the propeller shaft assembly into the forward gear/bearing assembly.
a
a

Bearing Carrier

Slide the bearing carrier assembly over the propeller shaft. Secure the carrier to the gear housing with two bolts and flat
washers. Tighten the bolts to the specified torque.
a
Description
Bolts with washers
Page 6A-26
Description
a - Propeller shaft
25641
a - Carrier
b - Bolts and washers
b
25646
Where Used
Shift shaft surface
Nm
5.6
90-8M0065421 NOVEMBER 2012
Part No.
92-802859A 1
lb‑in. lb‑ft
50