Drilling Outboard Mounting Holes (Power Trim And Gas Assist) - Mercury 25 EFI Service Manual

2. Tighten the transom clamp bolts.
3. Use a long drill bit to drill the two lower 8 mm (0.315 in.) holes through the transom using the transom clamps as a
template for the bolt hole pattern.
a
b
4. Apply marine sealer to shanks of bolts. Do not apply marine sealer to the threads of the bolts.
5. Secure the engine to the transom with the mounting hardware supplied with the engine. Tighten mounting hardware
securely.
a

Drilling Outboard Mounting Holes (Power Trim and Gas Assist)

1. Use the transom drilling fixture for drilling the transom mounting holes.
a
c
Transom Drilling Fixture
90-8M0105568 eng MARCH 2016
a - Upper transom clamp hole
b - Lower transom clamp hole
15949
a - Bolt (2)
b - Washer (2)
c - Locknut (2)
c
b
15729
a - Drill guide holes
b
b - Transom drilling fixture
c - Transom center line
a
2757
15728
91‑98234A2
© 2016 Mercury Marine
Outboard Installation
Page 1D-5