I recently purchased a 2000 40hp Johnson tiller with power trim/tilt to replace an older 30hp. The 30hp was a screw clamp mount type where the 40hp is going to be mounted via 4 1/2"bolts. This is going into a Lund ws-16 rated for 50hp. Is there anything other than drilling the holes and siliconing bolts that I need to be aware of...besides being centered and all that. Any idea on how tight to go on the nuts? Should I use a back plate on the inside on lower bolts to disperse stress? Any advice would be appreciated. Only want to do this once. Thanks a bunch.
