Water preassure in Bravo XR?
#32
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iTrader: (1)
How were you able to determine that the hose was twisted? I've looked at mine (with drive installed), and it doesn't look twisted, but not sure I can tell with drive installed.
Thanks.
Did you replace the hard-walled hose between sea water pump and water neck at the transom? I've heard that they can delaminate inside and suck closed. I replaced mine but unfortunately, it had no effect.
Thanks.
Did you replace the hard-walled hose between sea water pump and water neck at the transom? I've heard that they can delaminate inside and suck closed. I replaced mine but unfortunately, it had no effect.
#34
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I've seen the inside of perfectly good appearing hoses delaminate , fluid will go inside the delamination and bulge inwards .Effectively blocking the hose ,causing a restriction , either suction or pressure .
The Hydraulic guys call it a Flapper.
The Hydraulic guys call it a Flapper.
#35
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Thread Starter
Since I swapped intake lines from side to side, the hose is not an issue. (read above)
#36
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Thread Starter
After another new impeller and housing, checked ALL the hoses, (clear) checked the oil cooler ports, (clear) fuel cooler ports, (clear) heat exchanger ports, (clear) restrictor at the headers, (clear) still have low water pressure. Rigged a temp. external water pick up, (by passing the outdrive) pressure is good but at 60 MPH. 4000 RPM it hits 40 PSI. Too high. I am totally stumped. Any other ideas?
#37
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iTrader: (6)
After another new impeller and housing, checked ALL the hoses, (clear) checked the oil cooler ports, (clear) fuel cooler ports, (clear) heat exchanger ports, (clear) restrictor at the headers, (clear) still have low water pressure. Rigged a temp. external water pick up, (by passing the outdrive) pressure is good but at 60 MPH. 4000 RPM it hits 40 PSI. Too high. I am totally stumped. Any other ideas?
#38
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Thread Starter
Earlier post referenced that 40+- PSI is too high. If I don't have to worry about the 40PSI with direct water intake, (eliminating the outdrive intake, and allowing the water to be forced in) I'm ok. But.. here is the "but" if the direct water intake goes to 40 psi, that shows a restriction to me. There is NO restriction before the sensor. If there is some restriction after the oil cooler, wouldn't that show a "high pressure" ? instead of low?
#39
Earlier post referenced that 40+- PSI is too high. If I don't have to worry about the 40PSI with direct water intake, (eliminating the outdrive intake, and allowing the water to be forced in) I'm ok. But.. here is the "but" if the direct water intake goes to 40 psi, that shows a restriction to me. There is NO restriction before the sensor. If there is some restriction after the oil cooler, wouldn't that show a "high pressure" ? instead of low?
#40
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Thread Starter
This must be incredibly frustrating. I know you've tried a lot of things already, but there has to be something you're missing. If you go with the direct water pickup, you're treating the symptom. Do you have a sea strainer? Have you tried bypassing the strainer but still pulling from the drive? Maybe there is an air leak there. Does your strainer have a relief valve? Maybe that has failed and is allowing air in which is bleeding off suction. Have you tried swapping the water pressure sensors on the engines to see if the problem follows or stays with the engine ? Are you sure the core of the heat exchanger is unclogged?