Whoops - I did it, ran the engine about 30 minutes, docking, with the raw water seacock closed. Engine did not over heat. When I realized what I did, I opened the cover on the pump and inspected the impeller without removing it - it loooked intact, complete. I opened the seacock and started the motor. Exhaust contained black ink or soot like dischrge in the water (not smoke). Cleared p in a couple of minutes. Any guesses on probable damage? Thanks, jv
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Jose Venegas
Check your impeler
I did the same mistake last fall just before taking the boat out of the water. I checked it then and it looked fine then. This spring I found that although the impeller looked ok, it had a crack in one of the blades. I would change the impeler. Good luck
I did the same mistake last fall just before taking the boat out of the water. I checked it then and it looked fine then. This spring I found that although the impeller looked ok, it had a crack in one of the blades. I would change the impeler. Good luck
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andy
Impellers are cheap - change it and sleep at night
hey - this BB will not let you post without writing something in this box. The heat of running dry might have cracked a fin on the impeller. it is much easier to replace now then chase broken pieces thru the cooling system later.
hey - this BB will not let you post without writing something in this box. The heat of running dry might have cracked a fin on the impeller. it is much easier to replace now then chase broken pieces thru the cooling system later.
Some would recommend that you start.....
John: Some would recommend that you start your engine with the seacock closed. This helps eliminate the chance that you would ever get water into the cylinders when cranking. As far as having this thing run for 30 mins., I think you should check out the impeller. You may want to just go ahead and change it out and save it as a spare. I am not sure that the impeller would overheat. There is probably still water in the pump if water is not coming in from the seacock. One thing you may want to listen to your exhaust in the future. There is usually a hollow sound in the exhaust rather than a gurgle.
John: Some would recommend that you start your engine with the seacock closed. This helps eliminate the chance that you would ever get water into the cylinders when cranking. As far as having this thing run for 30 mins., I think you should check out the impeller. You may want to just go ahead and change it out and save it as a spare. I am not sure that the impeller would overheat. There is probably still water in the pump if water is not coming in from the seacock. One thing you may want to listen to your exhaust in the future. There is usually a hollow sound in the exhaust rather than a gurgle.
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Trevor
Leave your ignition key on the thru-hull handle
That's how I remember to always open it before starting the engine. Just a thought, Trevor
That's how I remember to always open it before starting the engine. Just a thought, Trevor
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John Visser
Yes Trevor!
Believ it or not, that is EXACTLY the protocol I implemented until this one event. It was the first time EVER I left the key in the ignition overnight. Oh well, ... Thank to all who replied so far. I guess I'm O.K. once I replace the impeller. jv
Believ it or not, that is EXACTLY the protocol I implemented until this one event. It was the first time EVER I left the key in the ignition overnight. Oh well, ... Thank to all who replied so far. I guess I'm O.K. once I replace the impeller. jv
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Jose Venegas
Visual inspection of exhaust pipe
My boat does not have an ingnition key switch but I have added a sign next to the start button to remind me to check that water comes out of the pipe. This should rule out a closed seacock and also potential obstructions or malfunctions of the system. Is this true?
My boat does not have an ingnition key switch but I have added a sign next to the start button to remind me to check that water comes out of the pipe. This should rule out a closed seacock and also potential obstructions or malfunctions of the system. Is this true?
Some would recommend that you start.....
John: Some would recommend that you start your engine with the seacock closed. This helps eliminate the chance that you would ever get water into the cylinders when cranking. As far as having this thing run for 30 mins., I think you should check out the impeller. You may want to just go ahead and change it out and save it as a spare. I am not sure that the impeller would overheat. There is probably still water in the pump if water is not coming in from the seacock. One thing you may want to listen to your exhaust in the future. There is usually a hollow sound in the exhaust rather than a gurgle.
John: Some would recommend that you start your engine with the seacock closed. This helps eliminate the chance that you would ever get water into the cylinders when cranking. As far as having this thing run for 30 mins., I think you should check out the impeller. You may want to just go ahead and change it out and save it as a spare. I am not sure that the impeller would overheat. There is probably still water in the pump if water is not coming in from the seacock. One thing you may want to listen to your exhaust in the future. There is usually a hollow sound in the exhaust rather than a gurgle.
T
Tom
Checklist
You might want to try a checklist so you don't do it again. I have a checklist for both leaving and coming in and it really works. No way would I remember everything without it. My boys especially like to read it out. It makes them feel like they are part of the crew which they are. Thanks, Tom
You might want to try a checklist so you don't do it again. I have a checklist for both leaving and coming in and it really works. No way would I remember everything without it. My boys especially like to read it out. It makes them feel like they are part of the crew which they are. Thanks, Tom
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John Visser
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