1992 Johnson Evinrude "EN" 40 thru 55 Service Manual, P/N 508143, Page 18Get this manual
Engine Specifications 45 and 55 CommOperation Full Throttle Operating Range Power Power Rated Idle RPM in Gear Test Propeller Minimum Test RPM Weight 4500 to 5500 RPM 4545 HP (33,6 kw) 5555 HP (39,5 kw) 5000 RPM 725 25 OMC PIN 382861 5200 R- 184 Ibs(83,4 kg)191 Ibs(86,6 kg)202 Ibs(91,6 kg)
Powerhead Type Displacement Bore Stroke Standard BoreCrankshaft 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 cuin(737 cm3.1875 in(80,96 mm) 2.820 in(71 ,63 mm) 3.1870-3.1880 in (80,95-80,98 mm)