Honda BF35A-BF45A Outboard Motors Shop Manual., Page 291Get this manual
NOTE: No problem if the overheat indicator light comes ON when restarting the engine after hot soak at high temperature, but comes OFF after idling for few minutes YES
Remove the foreign material and
recheck2Start the engine and check the cooling system indicator with the engine idlingDoes cooling water constantly flow through the cooling system indicator?
Check the discharge port for clogging, clean the discharge port if necessarya Check the water pump for wear or damageReplace or repair the water pumpa Check the water tube for clogging or damageClean or replace the water tube if necessarya
3Idle in gear for few minutes to