1998 Johnson Evinrude "EC" 40 thru 55 2-Cylinder Service Manual, P/N 520206, Page 14Get this manual
Engine Specifications
40, 50SPL, 50
Operation
Full Throttle Operating Range Power Power Rated Idle RPM in Gear Test Propeller Minimum Test RPM Weight
4500 to 5500 RPM
4040 HP (29,8 kw) 50SPL, 5050 HP (37,0 kw)
5000 RPM 800 25 OMC PIN 432968
404900 50SPL, 505200
R,E,TE-180 Ibs81,1 kg) RL, EL, TL, TEL185 Ibs(84,0 kg)