2007 Johnson 2 HP 4-Stroke Service Manual, Page 159Get this manual
If weakened, parts could fail later on the water, when not expected
If boat plate showsUse only or smaller When rigging or fixing any boat, if transom looks weak, tell the ownerIf transom is curved, outboard may come looseMount on flat surface onlyUse shims to make surface flat
Use bolts, nuts, and washers supplied with outboardThey are usually special, and will not rust or weaken