[Sam Mac]

2135 is pretty much like all of the 2000 series Cubs. Fuel tank feeds a hose to the filter then to the pump. Fuel line from the tank to the filter at this age should be replaced. It tends to collapse and restrict flow. Tank should be removed and cleaned to remove debris, doesn't take much to block the flow. OEM type filter should work just fine. Fuel pump may need to be replaced if the output is weak. Next thing in line is the carb. It may need a good cleaning and a rebuild. Reality is it's not a new tractor anymore. People try to avoid having to remove the fender pan and tank because it's a PITA but from what I've seen on the 2000's a new fuel line and a clean tank solve most of the problems. Just my 2 cents but I've seen too many fuel lines with problems and in my opinion ethanol gas is a big part of the problem, many of the older machines where built before ethanol and the hose's are not designed for it. I know I will get differing views on the ethanol issue, mostly from guys that are involved in the corn industry. Just for the record I'm all for ethanol in Booze and food.