2002 Marada with a Bravo 3. Salt water use. Relatively low hours but only winterized annually - deferred maintenance (if anything). Appears to be a very original engine with no signs of incompetent repair/maintenance attempts.
I immediately replaced the impeller which was completely done. All fins were gone. Most pieces were jammed into the output opening of the impeller housing. I recovered (what I thought) all of the pieces of the fins and laid them out/puzzled them back to the impeller stub.
I replaced the impeller with a kit (new housing) and made sure that the impeller was properly oriented. I had tagged the upper impeller hose for reassembly with a zip tie. Unfortunately the zip tie came off while I horsed around with the hoses. I'm pretty certain that I installed the hoses correctly, per the attached diagram. The system does have what appears to be a flush attachment that teed from an open garden hose line, into the hose that I installed as the upper/intake hose. When I pulled the garden hose line from the T, I saw pink antifreeze seep out.
Put the boat in the water to test.
At idle, in the lake, temp seemed to stay at the 150 mark for a while, but as I revved the engine, it started to climb. When it approached 190, I shut the engine off.
After letting the engine cool at bit, I pulled all four hoses at the thermostat housing. All appeared to be dry. Removed the thermostat housing and the thermostat didn't appear to be stuck (retracted).
Thinking that the system could use a prime, I added fresh water to all four hoses and reattached.
Started the engine again, and once again, the temp gradually rose above 175. While the engine was running, I pulled each hose at the therm housing and there appeared to be no water flow.
I'm new to this boat, so I don't know its history. I'm also not sure about whether or not there is any kind of raw water shut off valve or seacock (are seacocks primarily used for closed systems?). I don't recall seeing any kind of open/close valve on or near the flush attachment and assumed that it was a basic one-way valve. Maybe I'm missing something.
Is there a troubleshooting process that I can take that would help me identify the issue, before going straight to the major steps like pulling the outdrive, risers, manifolds, etc.?
Thanks!
I immediately replaced the impeller which was completely done. All fins were gone. Most pieces were jammed into the output opening of the impeller housing. I recovered (what I thought) all of the pieces of the fins and laid them out/puzzled them back to the impeller stub.
I replaced the impeller with a kit (new housing) and made sure that the impeller was properly oriented. I had tagged the upper impeller hose for reassembly with a zip tie. Unfortunately the zip tie came off while I horsed around with the hoses. I'm pretty certain that I installed the hoses correctly, per the attached diagram. The system does have what appears to be a flush attachment that teed from an open garden hose line, into the hose that I installed as the upper/intake hose. When I pulled the garden hose line from the T, I saw pink antifreeze seep out.
Put the boat in the water to test.
At idle, in the lake, temp seemed to stay at the 150 mark for a while, but as I revved the engine, it started to climb. When it approached 190, I shut the engine off.
After letting the engine cool at bit, I pulled all four hoses at the thermostat housing. All appeared to be dry. Removed the thermostat housing and the thermostat didn't appear to be stuck (retracted).
Thinking that the system could use a prime, I added fresh water to all four hoses and reattached.
Started the engine again, and once again, the temp gradually rose above 175. While the engine was running, I pulled each hose at the therm housing and there appeared to be no water flow.
I'm new to this boat, so I don't know its history. I'm also not sure about whether or not there is any kind of raw water shut off valve or seacock (are seacocks primarily used for closed systems?). I don't recall seeing any kind of open/close valve on or near the flush attachment and assumed that it was a basic one-way valve. Maybe I'm missing something.
Is there a troubleshooting process that I can take that would help me identify the issue, before going straight to the major steps like pulling the outdrive, risers, manifolds, etc.?
Thanks!
