Friends older 1983 Tiarra has phase separation on the starboard tank

[sdowney717]

I told him to pull the diptube out of the aluminum tank and drop a 3/8 copper tube down the hole. Then use a pulse electric pump to pump out 65 gallons of bad gas.

He has couple 5 gallon fuel cans, and can dump the bad gas at the Newport News dump.
Aluminum tank holds 100 gallons, and shaped like a rectangle. They are next to each other in rear of boat. Pickup is close to edge and boat sits at an angle, so I figure most can be pumped out.

Any more ideas? I checked the Perko looking fuel fills and the rubber oring still seems ok.
He may get a new fill.

 

[sdowney717]

Other issue is that starboard fuel pump seems weak. Engine is MIE 260.
We attached a clear vinyl hose to the steel fuel line and cranked engine.
The pump can not lift the fuel, like I had the 5 gallon bucket sitting on the riser area, and it could not move fuel into the bucket. The fuel just went back and forth in the clear tubing.
When I lowered the tubing so it was at carb inlet fitting level, it could pump fuel out the hose end, but just seems weak to me. We did change the spin on fuel filter.

The gas came out rusty looking, wet with clear phase separation and yellow gas floating on top.
Dumped the fuel filter into bucket and it is rusty and nasty looking. I had just rebuilt his quadrajet 4MV, and it was full of white chunks. So when I put it on the engine, it would not run unless choke held closed and sprayed starter fluid in to keep it running.
That is when I realized the fuel was full of water.

I dumped quadrajet upside down to dump out the bad fuel, switched levers to port tank, cranked engine over, port fuel looks fine, and engine runs perfect.