Mercury 25 EFI FourStroke User Manual page 142

INSTALLING THE OUTBOARD ON THE TRANSOM
(MANUAL TILT MODELS)
IMPORTANT: Models not equipped with power trim or gas assist
must have the transom clamps contacting the top of the transom,
and the clamp screws tightened, prior to drilling the mounting
bolt holes through the transom.
1. Place outboard on centerline of transom.
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
INSTALLATION
27005
a - Upper transom clamp hole
b - Lower transom clamp hole
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eng