1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 163Get this manual
[";';l 1440, 48, 50Apply OMC Gasket Sealing Compound to
outside diameter oftemperature switch and install in cylinder headInstall sending unit cover15.45 WMLApply OMC Triple-Guard grease to pressure relief grommet and install in cylinder head
1645 WMLInstall thermostat relief valve and spring in cylinder headThe tapered side of relief valve must face the rubber grommet17.45 WMLApply OMC Gasket Sealing Compoundto 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)
1618Place the thermostat and thermostat spring in the cylinder headPlace new O-ring on the thermostat coverApply OMC Gasket Sealing Compound to threads of the coverInstall and tighten the coverf17119If 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 bearing