4.3GS PWTR Raw Water Flow Question

[Leedanger]

99' 4.3GS PWTR

On the muffs with the water turned up to higher pressure than I'd normally run it at and outdrive in the down position I see no to little water coming to the inlet side of the raw water pump which I have disconnected from the pump itself. So somewhere between the inlet of the pump, heat exchanger, and the outdrive I have an issue it seems. Any thoughts specifically? I was hoping to not have to pull the drive but it looks as though I may have to.

 

[Don S]

Re: 4.3GS PWTR Raw Water Flow Question

The pump creates the suction that pulls the water up from the drive, not the pressure from the hose feeding the pump.

 

[Leedanger]

Re: 4.3GS PWTR Raw Water Flow Question

The pump creates the suction that pulls the water up from the drive, not the pressure from the hose feeding the pump.

I knew that had to be air tight to work properly throughout the system, but I guess I expected the hose pressure to be enough to push it to that point...no..? I suppose the thing to do is just get some clear tubing as suggested and test it properly as I should have from the start. I just rebuilt this engine and after running it, for a short amount of time, there wasn't a drop coming out of the block drain cocks so I got nervous.

Does it matter which port of the raw water pump I put the inlet hose from the exchanger on? I have it on the bottom and the hose going up to the therm on the top....I am second guessing myself all over the place.

 

[Leedanger]

Re: 4.3GS PWTR Raw Water Flow Question

Does it matter which port of the raw water pump I put the inlet hose from the exchanger on? I have it on the bottom and the hose going up to the therm on the top....

Don you just answered my question in another thread that I have this backwards....looks like I need a new impeller.