Mercury 25 EFI FourStroke User Manual page 143

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
INSTALLING THE OUTBOARD ON THE TRANSOM
(POWER TRIM AND GAS ASSIST)
IMPORTANT: Determine the strength of the boat transom. The
outboard mounting locknuts and bolts should be able to hold
75 Nm (55 lb. ft.) of torque without the boat transom yielding or
cracking. If the boat transom yields or cracks under this torque,
the construction of the transom may not be adequate. The boat
transom must be strengthened or the load carrying area
increased.
a - Transom yielding under bolt torque
b - Transom cracking under bolt torque
eng
INSTALLATION
c
b
a
133
a - Bolt (2)
b - Washer (2)
c - Locknut (2)
15729
b
18961