Sea water flow?
#1
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Thread Starter
Sea water flow?
1994 Merc. 454 Mag. Bravo 1. Problem.
Very little water coming in and out. Impeller is new. With the hose, (under preassure) water flow is good. Interior of block seems ok, since there is good flow in and out with hose, Even after the impeller housing when I hook the hose up passed the impeller. Intake hose is OK, no crimps. etc. I can blow air out at the hose when intake goes to the impeler, no ristriction. OK so.. Where could I have a leak, or having no "vacum" to the impeller. I think it might just be sucking air, even when outdrive is submerged. Any thought?
THx
P
Very little water coming in and out. Impeller is new. With the hose, (under preassure) water flow is good. Interior of block seems ok, since there is good flow in and out with hose, Even after the impeller housing when I hook the hose up passed the impeller. Intake hose is OK, no crimps. etc. I can blow air out at the hose when intake goes to the impeler, no ristriction. OK so.. Where could I have a leak, or having no "vacum" to the impeller. I think it might just be sucking air, even when outdrive is submerged. Any thought?
THx
P
#4
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you have a soft hose Pete?? under the hose, the pump has to suck less. Without the boost from the hose the suction would be greater collapsing a hose and reducing flow. Check the hose from the helmet to the gimble too.
#6
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The connection at the inner transom plate is good.
#7
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Join Date: Aug 2005
Location: Between A Womans Leggs in IL
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Fixx
theirs a in and out on both hose nipples at the back og the seapump housing..in/out on one and in/out on the other.....if you run in salt the area between the outter hose and the inner fitting gets plugged up ,,that section is small..try taking the inside fitting off and you may see a build up of corrosion..
#8
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theirs a in and out on both hose nipples at the back og the seapump housing..in/out on one and in/out on the other.....if you run in salt the area between the outter hose and the inner fitting gets plugged up ,,that section is small..try taking the inside fitting off and you may see a build up of corrosion..
#9
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I struggled a bit with this last month. I verified I had no air leak by putting duct tape over the holes at the bottom of my Bravo 1. I was able to suck on the pump inlet hose and create a vacuum. I also stuck a garden hose into the pump inlet hose to make sure all the hose water came out the holes. Free flowing and no air leaks.
#10
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When was the last time you changed the molded hose that goes from the helmet to the inner transom assy? The fitting where the molded hose attaches to the inner transom is prone to corrosion. Only way to see it is by removing the hard hose housing at the transom inside the boat. I would start by replacing that. Another thing I have seen, though not as common, is the hard hose delaminating inside. The water gets under a layer and collapses the hose internally starving the pump of flow.