[Mgs] Carburetors

[Barney Gaylord]

Most likely a clogged fuel filter of screen, or a low flow fuel 
pump.  Start by disconnecting the hose feeding the carbs.  Hold it in 
a catch vessel, switch on, and check teh fuel flow.  You should get a 
veritable gusher, at least one pint per minute.  If not, then check 
for a kinked fuel pipe, check the screen in the fuel pump, check for 
an air leak in the line between tank and pump, check for anstructed 
pickup inside the tank.

If you have good fuel flow at the feed hose, then check the screens 
in the float chamber inlet ports.  Since you can sometimes get full 
power for some time, there is likely no problem with fuel feed from 
the float chambers to the main jets.  Problem is most liekly loss of 
fuel level in the float chamber(s).  This might also be caused by a 
faulty float valve or a sticking (or less likely sinking) float.


At 03:36 AM 1/11/2011 +0000, Douglas McKinnie wrote:
>....
>.... on the interstate highway. At first this morning all was fine, 
>but  then I noticed in the East TN long uphill stretches that the 
>more I pressed the accelerator pedal the slower I seemed to go. At 
>times I could only maintain a speed of about 50 MPH, .... If I let 
>off the pedal a bit, that seemed to give the engine a bit more 
>energy, but not enough to increase the speed at all.
>
>Eventually I discovered that if I let up the pedal fully and then 
>pushed down again I would get the full power that I was used to, but 
>it would eventually bog down again. By pulsing the pedal off every 
>so often I was able to keep up with any traffic I wanted to keep up 
>with, even on the long steep uphills.
>
>.... what would cause this sort of behavior.
>....