1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 14Get this manual
Engine Specifications
250,40,48, 50
Operation Full Throttle Operating Range Power 4500 to 5500 RPM
25025 HP (18,4 kw) 4040 HP (29,8 kw) 4848 HP (35,8 kw) 5050 HP (37,0 kw)
5000 RPM 750 25
Power Rated Idle RPM in Gear Test Propeller Minimum Test RPM
250OMC PIN 433638
40 thru 50OMC PIN 432968
2505000
404900 48,505200