bigchunkytaco
Seaman
- Joined
- Feb 6, 2011
- Messages
- 54
my starboard mercruiser 260 has started overheating, it is fresh water cooled, the resevoir seems to stay cool to the touch and is not losing coolant, the overheating began when the hot water system line that is spliced in to the engine cooling pipes split, i replaced it but did not resolve, i am wondering if there could be blockage in the hot water system and if its worth bypassing to diagnose..
there are also leaks coming from the large metal cylinders in the exhaust pipes. i have never seen these before they could be baffling or water locking units, there is not as much water exiting the exhaust of this engine compared to the other so i am wondering if this could be the problem or if it is more likely a stuck thermostat or riser problem...
1st pic is the hot water system in between the engines,
2nd, is the copper t piece between the cooling pipes of the engine that corroded through and i replaced, the red pipe goes to the hot water system.
3rd is the resevoir for the cooling system
4th is engine bay looking aft, the circled part is the only picture i have of the metal cylinders i tried to desrcibe, each of the 4 exhaust pipes goes from the riser through this upright cylinder and back out through the transom. the ones on the overheating engine are leaking and there is minimal water exiting through the exhaust however it has always been like this and used to run fine without o/heating...
there are also leaks coming from the large metal cylinders in the exhaust pipes. i have never seen these before they could be baffling or water locking units, there is not as much water exiting the exhaust of this engine compared to the other so i am wondering if this could be the problem or if it is more likely a stuck thermostat or riser problem...
1st pic is the hot water system in between the engines,
2nd, is the copper t piece between the cooling pipes of the engine that corroded through and i replaced, the red pipe goes to the hot water system.
3rd is the resevoir for the cooling system
4th is engine bay looking aft, the circled part is the only picture i have of the metal cylinders i tried to desrcibe, each of the 4 exhaust pipes goes from the riser through this upright cylinder and back out through the transom. the ones on the overheating engine are leaking and there is minimal water exiting through the exhaust however it has always been like this and used to run fine without o/heating...
