Seagreen
New member
So yes, the venerable BD722 is not liking to be pushed more than 1800 rpm, without the overheating alarm going off.
I have made sure the inlet seacock isnt blocked and enough water "seems" to be going through. However, I notice the impellor is a 10 blade jabsco rather than the usual 6 blade Beta, which I think may account for the problem. I've not had an impeller shred on me for many years so I don't really think a blockage is the problem. Also, I think the extra fireproofing about the engine box may be an issue, but surely the water cooling should take that into account, and a fan system isn't really needed?
My money's on the impeller. Any other opinions welcome.
I have made sure the inlet seacock isnt blocked and enough water "seems" to be going through. However, I notice the impellor is a 10 blade jabsco rather than the usual 6 blade Beta, which I think may account for the problem. I've not had an impeller shred on me for many years so I don't really think a blockage is the problem. Also, I think the extra fireproofing about the engine box may be an issue, but surely the water cooling should take that into account, and a fan system isn't really needed?
My money's on the impeller. Any other opinions welcome.