1992 Johnson Evinrude "EN" 40 thru 55 Service Manual, P/N 508143, Page 16Get this manual
Engine Specifications 40 CommOperation Full Throttle Operating Range Power Power Rated Idle RPM in Gear Test Propeller Minimum Test RPM Weight 4500 to 5500 RPM 40 HP (29,8 kw) 5000 RPM 750 25 OMC PIN 432968 4900
RS180 Ibs(81,1 kg) RSL185 Ibs(84 kg) RSY188 Ibs(86 kg) Powerhead Type Displacement Bore Stroke Standard Bore Crankshaft Dimensions: Top Journal Center Journal Bottom Journal Rod Crankpin Piston Diameter, Standard Piston Ring End Gap, Both Piston Ring Groove Side Clearance, Lower 1.4986-1.4991 in(38,06-38,08 mm) 1.3745-1.3749 in(34,91-34,92 mm) 1.1810-1.1815 in(30,00-30,01 mm) 1.1823-1.1828 in(30,03-30,04 mm) See Section 0.007-0.017 in(0,18-0,43 mm) 0.004 in(0,10 mm) maximum In-line 2-Cylinder 45 cu in(737 cm3.1875 in(80,96 mm) 2.820 in (71,63 mm) 3.1870-3.1880 in(80,95-80,98 mm)