Re: 60 horse on a 16.5
I presume that your Lund is aluminum.If it is,that 60 horse engine will make you move very fast.
When the Coast Guard came up with the rating calculations,they calculated according to stern width and height ,and overall length of the boat. Material was not much of a consideration.
Although you can legally hang a 100 horse engine on there, You really do not need it.
I will use my 18.10 foot Sylvan as an example.It is rated for 145 hp,but with the 75 horse engine that is on it,I run 38 mph (GPS).