1992 Johnson Evinrude "EN" 40 thru 55 Service Manual, P/N 508143, Page 163Get this manual
1440, 48, 50Apply OMC Gasket Sealing Compound to outside diameter oftemperature switch and install in cylinder headInstall sending unit cover1545 WMLApply OMC Triple-Guard grease to pressure relief grommet and install in cylinder head
r:;-;;-J 1645 WMLInstall thermostat relief valve and spring in cylinder headThe tapered side of relief valve must face the rubber grommet1745 WMLApply 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)
16 18Place the thermostat and thermostat spring in the cylinder headPlace new O-ring on the thermostat coverInstall and tighten the coverf171 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 bearing Install the retaining ring in groove of the crankshaft with sharp edge of the ring facing away from bearing