Honda BF35A-BF45A Outboard Motors Shop Manual., Page 469Get this manual
Propeller Selection Chart Use the following table as the guide for propeller selectionTest run the outboard motor and check the maximum speedIf it is not in the recommended maximum speed range shown in the table, replace the propeller and test run againAdjust bring the maximum speed the recommended speed range as neededPropeller size Model Diax pitch [inchl Speed (kmfh) Speed in the recommended engine speed range (kmlh)