1994 Johnson/Evinrude "ER" 60 thru 70 outboards Service Manual, Page 161Get this manual
135144Remove thermostat cover and spri ng136145Remove thermostat assembly and inspect137146To assemble the thermostat, insert pin into vernatherm with convex end of pin facing out
138147Position vernatherm in sealPosition retainer and spring
in thermostat housingAssemble halves
139148Install the thermostat assembly into the cylinder head
with the pin end of thermostat facing out
140149lightly coat both sides of new thermostat cover gasket
with OMC Gasket Sealing CompoundPosition the relief spring