1994 Johnson/Evinrude "ER" 9.9 thru 30 outboards Service Manual, Page 326Get this manual
50 If Boat Plate shows U.SCO AST GU RD CAPAC ITY INF ORMAT I.ON MAX HP MAX PE RSO NS 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