the heads on my 1992 140 Evinrude looper were leaking water and one was spraying at high speeds so i removed them and cleaned them meticulously and installed them with new gaskets and a little permatex. the one head looked like it had been machined at some point and the other didnt as it was pitted. i reinstalled them and ran it for about an hour with no leaks.
then i ran it for the weekend and when i wenjt back to retorque them after about 5 hours use i found one to be sealed but the same head was leaking water out of the top above the t-stat and spraying salt water all over the wiring. that is the head that appeared to have been machined too. retorquing them didnt fix it of course. what can i do? it doesnt seem like there should be that much pressure in there to spray like that. could it be the t-stat springs? or is there a better sealing compound?
also, if it has been surface ground before, could i do it again without throwing off the compression ratio too much? my plan was to have it surface ground again. help is much appreciated. thanks.
then i ran it for the weekend and when i wenjt back to retorque them after about 5 hours use i found one to be sealed but the same head was leaking water out of the top above the t-stat and spraying salt water all over the wiring. that is the head that appeared to have been machined too. retorquing them didnt fix it of course. what can i do? it doesnt seem like there should be that much pressure in there to spray like that. could it be the t-stat springs? or is there a better sealing compound?
also, if it has been surface ground before, could i do it again without throwing off the compression ratio too much? my plan was to have it surface ground again. help is much appreciated. thanks.
