HELP - SW1 fuel pump not running

"Doug Miller" > wrote in message
...
> In article >, "Oppie" >
> wrote:
.... but what follows is pure nonsense.
>
>>One question though. Did you replace the fuel filter? If the filter gets
>>plugged, the fuel pump pressure gets very high and can damage the pump or
>>just blow fuses eventually. Any water in the fuel system tends to plug a
>>filter almost immediately. Water molecules are much larger than gasoline
>>molecules
>
> Garbage.
>
> Gasoline is mostly heptane, and a heptane molecule is FAR larger than a
> water
> molecule. Water consists of one oxygen atom and two hydrogens. A carbon
> atom
> is a bit smaller than an oxygen atom, but heptane has *seven* of them,
> plus
> sixteen hydrogens. A water molecule is positively tiny by comparison.
>
>> and plug the pores in the filter membrane.
>
> Bulls**t.
>
>>Pull the filter and let
>>it drain into a glass jar. Look for water droplets. If you can blow
>>through
>>the filter (after it drains) - use a tube to blow through, the filter
>>isn't
>>plugged.
>
> He may have a plugged filter -- but it sure as hell isn't plugged with
> water.

(Hangs head in shame) You're right. Don't know what I was thinking.
Was ruminating about this old discussion and realized it wasn't molecule
size. Rather, when the paper filter membrane absorbs water, it swells and
the pores close off making it impermeable. The pores do not appreciably
change size in clean fuel.