Bravo raw water replacement in slip

Feb 6, 2019
122
Boat Info
2003 300DA SUNDANCER
Engines
MERCRUISER 5.0 W/BRAVO III
hello, can anyone tell me if it is OK to change my raw water sea pump while the boat is still in the water? Do wanna start the job and have water rushing in. I prefer to do it in my slip if possible thanks.
 
Yes you can do it in the water BUT you will need to plug the inlet hose once removed from the pump.

I wouldn't leave the boat unattended during that time either. (Just need to run a quick errand to get a tool)

If the Temporary plug lets loose, it could overrun the bilge pump and ..........well you know.
 
Yes you can do it in the water BUT you will need to plug the inlet hose once removed from the pump.

I wouldn't leave the boat unattended during that time either. (Just need to run a quick errand to get a tool)

If the Temporary plug lets loose, it could overrun the bilge pump and ..........well you know.
Ok thanks do you know what side hose so I can make a plug ready thanks
 
Pretty sure the hoses are around 1 1/4".
 
Yes 1 1/4". It will be a low pressure flow, a rag stuffed in there will work fine.
 
Wouldn’t clamping be better? I have a hose clamper specifically designed for clamping fuel lines there might be some suitable and more reliable for this use.
 
Guys thanks for the help its done and solved the problem. Let me tell a a good old shot glass does the trick to plug the hose haha!
 
You also can simply raise the unattached hose inside the boat higher than the water level on the outside of the boat. Water will not run in.
 
You also can simply raise the unattached hose inside the boat higher than the water level on the outside of the boat. Water will not run in.

Yes, in theory. The raw water hose is 1.25” wire reinforced hose that runs basically under the engine to water pump that is at 7:00 as you face the harmonic dampener end. Depending on boat and/or relationship to other engine there may be no where to move it to.
 

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