Cub Cadet 682

[Kevin in MN]

I have a Cub Cadet 682 with a Kohler MT17 . I’ve been working on other issue but noticed every time I go to start it after sitting for a few days the tank is empty. So I put some gas in and it starts right up. I now see lots of blow by and the oil is over full. So obviously my fuel is ending up in the crank case. So would a bad fuel pulp do this? And If so how do I change it? All I see is 4 screws and it's beneath the intake. The pictures of new ones look like an automotive type where it bolts to the side of the bock.
 

[Super Trucker]

Check your float, needle and seat. If the float is cracked it will soak fuel and make it open the needle and flow fuel. needle could be bad or the seat.
 

[joe csuti]

As super trucker said it's probably the float or dirty/worn float needle or seat,allowing valve to leak when eng at rest,pump may also be leaking internally.

Drain tank,buy/install a fuel shutoff valve between tank & pump,for testing connect a pc of hose from valve to carb bypassing fuel pump,let set a few days(valve open) & see if tank still drains into crankcase,if it does,then problem in carb,if gas still in tank,then pump bad/leaking internally.

The lower half of pump body is a right angle casting with arm in it,there are 2 bolts on flange of casting that hold pump to block,you may have to remove flywheel cover or sheetmetal/plastic covers to see bolts,also goto link below & download a service/repair manual for your eng.

After you locate/repair source of leak,change oil & filter(if eng has)DO NOT operate eng the way it is with gas in oil,gas thins & destroys lube property of oil & you'll be looking for a new eng soon.

LEAVE shutoff valve installed in line & turn off after each use in case leak starts again.
kohler

 

[Kevin in MN]

I had never bothered using the shut off valve before but I am now.

So basically it would be hard for the pump to leak into the engine. I'll check the carb, might as well do a rebuild. Any recommended carburetor kit vendors?
 

[Cubpuller]

It should be a KT17 not a MT17
 

[R Bedell]

Kevin in MN:

You have (A) a bad fuel pump, (B) a carb float problem, or (C) BOTH.
 

[shawmic]

I had the same problem with my John Deere lawn tractor so I put a small plastic shut-off on the fuel line before the carb and it solved the problem. No more empty fuel tank when left standing for a few days. Less than a $5 fix!