2006 Johnson SD 3.5 HP 2 Stroke Outboard Service Manual, PN 5006562, Page 33Get this manual
INSTALLATION AND PREDELIVERY OUTBOARD MOUNTING
OUTBOARD MOUNTING
WARNING
The outboard must be correctly installedFailure to correctly install the outboard could result in serious injury, death, or property damage
IMPORTANT: Use marine sealant rated for above or below waterline useRTV silicone is not approved for below waterline usePolyurethane sealants are not easily removed and may damage outboard or boat mounting surfaces when removedApply marine sealer (rated for above and below waterline use) under hex heads of bolts, on the mounting plates, and to the bolt shanks
IMPORTANT: Follow all directions carefullyThe outboard's warranty will not cover product damage or failure resulting from incorrect outboard installation&
WARNING
Even if equipped with clamp screws, the outboard must be bolted to the boat to prevent it from "working off the transom" during operationCenter the outboard on the boat's transom (or mounting bracket) and tighten the clamp screws by handAn accessory transom plate is recommended to protect the boat's transom (or mounting bracket)TYPICAL 1Clamp screws 2Transom plate 3Stern bracket holes