bigpursuit
Member
I own a 2000 Pursuit 7.4 Crusaders.* Last year I had a problem with the fresh water cooling system.* The Coolant resevoir was constantly overflowing.* This would only happen when the boat was moving under a load, not at the dock.* I would go out 10 or 12 miles and notice the smell of the anti freeze.* The boat temperature would rise slightly but never overheat.* I also began to notice the resevoir was bubbling.* Mechanics checked everything out(heat exchanger, exhaust elbow, impellers).* I finally asked for a compression check and it was concluded there was a potential head gasket problem.* Over the winter the head gaskets were replaced.
Put in the water couple weeks ago and went for a test run.* Things seemed ok but I hadn't gone very far.* Couple days later went out fishing, drove out to spot, trolled on that motor, total of 4 hours on engine.* When I got back in I noticed the resevoir had overflowed again.* Not much but considering the coolant level in the resevoir was below the add level when I started it had pushed alot of fluid out of the engine.* I left the boat alone to cool down (overnight) and came back to notice none of the fluid had been sucked back into the engine.* I drained fluid out of the resevoir and refilled the fluid in the engine.* I ran the boat @ idle until it warmed up let it cool and filled the engine again.* I haven't had it out since do to family and the holiday but i am really worried the replacement of the head gaskets didn't work.*
Is it possible there is just air in the system.* How do you tell that all air is purged from the fresh water system?* Any help would be greatly appreciated.
Put in the water couple weeks ago and went for a test run.* Things seemed ok but I hadn't gone very far.* Couple days later went out fishing, drove out to spot, trolled on that motor, total of 4 hours on engine.* When I got back in I noticed the resevoir had overflowed again.* Not much but considering the coolant level in the resevoir was below the add level when I started it had pushed alot of fluid out of the engine.* I left the boat alone to cool down (overnight) and came back to notice none of the fluid had been sucked back into the engine.* I drained fluid out of the resevoir and refilled the fluid in the engine.* I ran the boat @ idle until it warmed up let it cool and filled the engine again.* I haven't had it out since do to family and the holiday but i am really worried the replacement of the head gaskets didn't work.*
Is it possible there is just air in the system.* How do you tell that all air is purged from the fresh water system?* Any help would be greatly appreciated.
Last edited: