"Well i have a 99 searay with
"Well i have a 99 searay with as 4.3 merc with a alpha one outdrive. It also has a closed cooling system in it. But not entirely closed. Seawater only goes into my manifolds. i got this boat used. The temp was normal at 170F degrees. But the very last time i took it out for fishing the temp started going up. slowing moving pass 180F
then the temp alarm went off, so i shut it down.
Then i grab my emergency tools out and remove the termostat. That stopped the needle from going pass 180F. So i kept on doing what was planned for the day. the next week i bought new manifolds a 2 piece one (i have a 1 piece) thinking it might be the reason for the increase of temp. I also saw my water shutter were not there. what happen to them? Is there a aftermarket one the is metal rather that plastic. Do you think my engine is ok. What else could be the reason for overheating?"
"Well i have a 99 searay with as 4.3 merc with a alpha one outdrive. It also has a closed cooling system in it. But not entirely closed. Seawater only goes into my manifolds. i got this boat used. The temp was normal at 170F degrees. But the very last time i took it out for fishing the temp started going up. slowing moving pass 180F
then the temp alarm went off, so i shut it down.
Then i grab my emergency tools out and remove the termostat. That stopped the needle from going pass 180F. So i kept on doing what was planned for the day. the next week i bought new manifolds a 2 piece one (i have a 1 piece) thinking it might be the reason for the increase of temp. I also saw my water shutter were not there. what happen to them? Is there a aftermarket one the is metal rather that plastic. Do you think my engine is ok. What else could be the reason for overheating?"