1998 Johnson Evinrude "EC" 125C, 130, 200, 225, 250 90 deg LV Service Manual, P/N 520212, Page 224Get this manual
Thermostat ServicingV6 Disassembly
1Push the hose off the nipple with flat blade screwdriverRemove the screws retaining the thermostat cover2Remove the cover, gasket, and spring3Remove the thermostat assembly
4Remove the thermostat sleeve in the cylinder head and inspectReplace if damaged
rn 5Inspect the cover, gasket, and nippleReplace if damaged6Inspect the thermostat assembly, seal, and springReplace if damagedAssembly