Mercury 25 EFI Service Manual page 531

9. After setting the impeller height, tighten the impeller nut to the specified torque. Secure the impeller nut by bending the tabs
on the nut retainer against the flats on the impeller nut.
Description
Impeller nut
NOTE: If the outboard is used in saltwater, apply Extreme Grease around the entire mounting flange on the water intake
housing and also to the threads on the mounting bolts.
10. Install the water intake housing with six bolts. Ensure the front of the housing is facing towards the front of the outboard.
Tighten the mounting bolts to the specified torque.
b
Tube Ref No.
Extreme Grease
Description
Water intake housing mounting bolts
90-8M0105568 eng MARCH 2016
a
Description
Mounting flange on the water intake housing, mounting bolt
a -
b -
b
25825
a
25729
Where Used
threads
© 2016 Mercury Marine
Jet Drive Outboard
Impeller nut
Nut retainer
Nm lb. in.
34.0
a - Mounting bolts
b - Water intake housing
Nm lb. in.
11.3 100
lb. ft.
25
Part No.
8M0071842
lb. ft.
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