[Mgs] fuel pump difficulties

[mgbob at juno.com]

Hi Clayton,  The pump you pictured does have a filter, on the face that has the large round gasket behind the zinc-looking casting. See the diagram D.3 in the workshop manual, item 55.   This filter will keep out chunks of rust but will not stop water, as you have found.     When everything is working right, the pump will push clean fuel, but the tank must be clean too, and I wonder if air-drying the tank as you have done will suffice.  You might dump a pint of alcohol in the tank, slosh it around, absorbing water and some dirt, then drain and dry again. If you have dry compressed air, you might try that too, then put the tank into the sun for a few days.  Water would seem to be easy to get out of a tank; it's surprisingly difficult.   Have you replaced the flexible fuel lines?  If not, consider new ones. The originals could be brittle now, and sloughing inside which will be increased by presence of fresh fuel.  If you saw little black chunks in the float bowls or passages, it is fuel line material. These lines are not under much pressure, 2.5-4.0 psi, but they are thoughtfully located over the exhaust manifold....Bob

---------- Original Message ----------
From: Clayton Kirkwood via Mgs <mgs at autox.team.net>
To: <mgs at autox.team.net>
Subject: [Mgs] fuel pump difficulties
Date: Thu, 22 Oct 2015 18:44:23 -0700


Hello all. My 62 mga 1622 fuel system is sick. I’ve mentioned it in previous posts and have had some great replies. I broke the floats up and what a surprise: white goo around the float pin and lifter. The water had lots of water in it (when it was emptied out the garage floor had water on top of gas). I pumped it for awhile and the pump coughed and spit and kicked out  a murky mix. I did this for some time and the kicking and spurting continued, so I finally looked at the pump. Hopefully attached. There is the diaphragm on the bottom which has some water in it. I couldn’t find the filter, which on, apparently, the original pump was opposite the input/output. So, does this pump have a filter.
 
I cleaned up the carb. White crap on the float pin, water in the bowl (it appears to be an HS4), and just clearly polluted. It seems the pump is not running properly. The seals on the bowl have broken down ( while being separated).
 
Any ideas on the pump filter? Is it supposed to belch out, and be cloudy? I drained the tank earlier, let it sit for days to air out, and put new fuel in. I would think by now any water should be gone.
 
TIA,
 
Clayton
 
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