1990 Johnson Evinrude "ES" 9.9 thru 30 Service Manual, P/N 507871, Page 343Get this manual
If Boat Plate shows U .SCOAST GUARD CAPAC ITY INF ORMATI ON MAX HP MAX PERSONS MAX WEIG HT
use Only Or Smaller!
When Rigging or Fixing any boat if transom looks Weak, tell the owner If transom is Curved, motor may come Loose Mount on Flat Surface only Use Shims to make surface flat