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Crankcase keeps filling up with gas


dagwoodbumstead's Avatar
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06-21-13, 12:05 PM   #1  
Crankcase keeps filling up with gas

I have a 1994 Murray 42inch cut with a 16hp Tecumseh engine and this has happened before, so this is the second time this year. Why does my gasoline keep going into my crankcase with my oil? What do I need to do to prevent this from happening?

 
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06-21-13, 12:15 PM   #2  
Time for a carb re-build. The bowl is filling up and the float, needle and seat aren't stopping the gas, so it flows out into the cylinders and past the pistons to the crankcase.

Could be just some junk keeping the needle valve from closing. Pull the bowl and clean it out...see if you have any junk in it. Could also be as simple as the float is cracked and not holding pressure on the needle valve.


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06-21-13, 01:43 PM   #3  
Thanks sir, that's exactly what I thought, just needed to be reassured. Is anyone else having trouble with the gas nowadays like I am? I have had two lawnmowers, a weedeater and two blowers stop up because of this new gasoline. It seem to be eating the rubber carb parts up bad.

 
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06-21-13, 01:52 PM   #4  
Oh yeah...many many problems reported, with older equipment especially. Newer products less so, from what I understand.

I think everyone recommends StaBil or some other additive to help, but the main thing is only buy as much gas as you need in a month.

No small engine Pro...just what I've learned here.


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06-21-13, 01:56 PM   #5  
That's a very good tip. Thanks again.

 
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06-21-13, 10:41 PM   #6  
Yep, Gunguy45 is right. The trend seems to be catching at gas stations to sell non ethanol fuel. If you can find this, you can behave as you once did with your fuel. If not, you can add treatment, but there will be fuel related problems.


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06-22-13, 04:08 AM   #7  
Ya, that's what I do - buy non ethanol gas for my small engines. If you do an internet search you can probably find where it's sold near you. I probably have a half dozen stations to choose from in a a 20 mile radius. Expect to pay more per gallon but since we aren't filling up the car/truck - it's not that big of a deal.


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06-22-13, 04:34 AM   #8  
When I took the float bowl loose from my carb, the little round rubber gasket had started to deteriorate and bits of it were in the fuel bowl.

 
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