RE: Slimline Boxxer Fuel Pump
i bought the same pump after having poor luck with the sullivan that leaked nicely in my field box.
i have not had any problems with the new Boxer which is now over 2 years old and is working fine, but when i got it i did look into how it worked as i wasn't going to install another electric pump to which i would end up cleaning up another mess.
it is very simple in function and really has no more than 3 rollers that create the pumping action by rolling around the large fuel tubing that runs through it. the tubing goes into the casing like a loop with the 3 rollors positioned in the inside of this loop.........the end of the motor shaft goes into the middle of the 3 rollers. could be the motor shaft that has worn down too, although not likely.
really is just a few minutes to replace the tubing and rollers.
if it is less than a year old though i would send it to Slimline and he'll fix it ASAP for you.