1990 Johnson Evinrude "ES" 40 thru 55, P/N 507872, Page 148Get this manual
1440, 48, 50Apply OMC Gasket Sealing Compound to outside diameter of temperature sending unit and install in cylinder headInstall sending unit cover1545, 55 Comm- Apply OMC Triple-Guard grease to pressure relief grommet and install in cylinder headin cylinder headThe tapered side of relief valve must face the rubber grommet1745,55 Comm- Apply OMC Gasket Sealing Compound to both sides of new cylinder head water cover gasket; install the gasket and coverTighten the screws to torque of 60-84 inIbs(7-9 Nm)1161 1840,48,50Place the thermostat and thermostat spring in the cylinder headPlace new O-ring on the thermostat coverInstall and tighten the coverr:t7l 19If removed, oil and press new lower main bearing onto the crankshaftWhen pressing on the bearing, support the crankshaft between the two lower counterweights and press against the lettered side ofthe bearingInstall the retaining ring in groove of the crankshaft with sharp edge of the ring facing away from bearing118l 20Oil the upper main bearing surface of the crankshaftSlide the upper main bearing onto the crankshaft with seal facing the flywheel end of crankshaft1191 21Lightly coat the center main journal of the crankshaft surface with outboard lubricantInstall both halves of the center main bearings1201 22Place the sleeves around the bearings with retaining ring end of the sleeves facing flywheel end of the crankshaftSecure the sleeves together with the retaining ring22347