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Discussion Forum

Cub Cadet 682

Author  [Modern View]
Kevin in MN

07-08-2012 11:40:09
76.113.186.146



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I have a Cub Cadet 682 with a Kohler MT17 . Iíve 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.

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shawmic

07-14-2012 19:44:48
71.193.73.217



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 Re: Cub Cadet 682 in reply to Kevin in MN, 07-08-2012 11:40:09  
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!



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R Bedell

07-09-2012 03:33:32
174.125.91.167



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 Re: Cub Cadet 682 in reply to Kevin in MN, 07-08-2012 11:40:09  
Kevin in MN:

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



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Cubpuller

07-08-2012 18:26:18
216.145.156.69



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 Re: Cub Cadet 682 in reply to Kevin in MN, 07-08-2012 11:40:09  
It should be a KT17 not a MT17



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joe csuti

07-08-2012 13:14:29
70.111.203.46



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 Re: Cub Cadet 682 in reply to Kevin in MN, 07-08-2012 11:40:09  
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.

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Super Trucker

07-08-2012 12:03:19
99.150.167.110



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 Re: Cub Cadet 682 in reply to Kevin in MN, 07-08-2012 11:40:09  
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.



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