2005 Trophy Pro with 5.0 Mercruiser
I took my boat into the boat repairer because of an audible alarm that was going off. After they hooked it up to a computer it pulled a code for a bad air control sensor. The mechanic called me after they installed the sensor and told me that the alarm was not going off anymore, running good and not pulling any codes, but while they had it running it overheated. He stated that he believed that the water hose hooked up to the lower unit was not providing enough water so he suggested that I put it in the water to see if it did it again. He said many times that he did not think anything was wrong except for it not getting enough water through the muffs.
About a week later I put it in the water and the same result. It overheated in about 10 minutes. 250 degrees!!
Took it back to the shop and they said that it must be a bad thermostat. They ordered a new thermostat, took out the old one and still same result. Overheated again.
After a long discussion with the mechanic, I finally realized that the shop was not putting a hose to the seawater pick up that is through the hull and therefore, the engine was not getting any water and overheating. He admitted that he had no idea there was even a seawater pick up and thought the engine was getting water from the muffs on the lower unit!
Obviously now the motor overheats even when it is in the water. My question is what kind of damage was done? Do you think that it is just the impellar on the sea water pump? The entire sea water pump? Or even maybe engine damage? Blown head gasket? etc?
As always, thanks for the help.
I took my boat into the boat repairer because of an audible alarm that was going off. After they hooked it up to a computer it pulled a code for a bad air control sensor. The mechanic called me after they installed the sensor and told me that the alarm was not going off anymore, running good and not pulling any codes, but while they had it running it overheated. He stated that he believed that the water hose hooked up to the lower unit was not providing enough water so he suggested that I put it in the water to see if it did it again. He said many times that he did not think anything was wrong except for it not getting enough water through the muffs.
About a week later I put it in the water and the same result. It overheated in about 10 minutes. 250 degrees!!
Took it back to the shop and they said that it must be a bad thermostat. They ordered a new thermostat, took out the old one and still same result. Overheated again.
After a long discussion with the mechanic, I finally realized that the shop was not putting a hose to the seawater pick up that is through the hull and therefore, the engine was not getting any water and overheating. He admitted that he had no idea there was even a seawater pick up and thought the engine was getting water from the muffs on the lower unit!
Obviously now the motor overheats even when it is in the water. My question is what kind of damage was done? Do you think that it is just the impellar on the sea water pump? The entire sea water pump? Or even maybe engine damage? Blown head gasket? etc?
As always, thanks for the help.
