1974 Johnson 40 HP Outboard Motors Service manual, Page 9Get this manual
SPECIFICATIONS Model Numbers 40R74Standard length (15" transom) 40RL745" longer (20" transom) 40E74standard length (15" transom) 40EL745" longer (20" transom)] NOTE: The recommended full power operating range fOr your outboard motor is from 40005000 from R.P.M In order to get the best from your outboard th, upper eneror use in 4500 5000 R,P.M is the engine speed selecting the proper propellerThe R.P .Mshould
Propeller
options
3 blade, pitch blade, pitch blade, blade,
10-38" diax 11-1 2" 101 2" diax 12"
10-38" diax 14" pitch 11" diax 9" pitch
Speed control
On steering handleManual Start-
be measured with your expected average load in the