Question about Craftsman YT 3000 42" Briggs & Stratton 21 hp Gas Powered Riding Lawn

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Oil leak engine

Recently, I started the tractor and smoke was coming from the front of the engine. After looking around, I noticed that oil was seeping out from one of the welds on the muffler. I pulled the dipstick and there is definitely gas in the oil. Before this issue, we were having problems with the engine dying for no reason after it had been running for a while. I found out it was flooding because it would start again after it sat for a while. I'm guessing this is a carburetor problem, but how do I fix it?

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Posted on Jan 02, 2017

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Posted on Jun 08, 2009

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SOURCE: craftsman eager-1 3.75 mower will not stay running

the engine is not getting enough gas. when you hold down the primer you are bypassing this problem. to fix this simply adjust the carb's fuel screw, located on the side of carb, a little at a time until runs smoothly.

Posted on Jun 25, 2009

  • 389 Answers

SOURCE: 12.5 hp murray tractor while running started to

Sounds like you have dirt in your float bowl or your float needle and seat are worn out. Pull off the float bowl and look for contamination, remove the float and see if it is full of gas (it should NOT be) and check the float needle to see if it is grooved, cracked or badly worn. Be sure you change your oil as it has gas in it!!!

Posted on Oct 02, 2009

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SOURCE: I have a 7 year

I have a Craftsman mower. Last year I had a similar problem with the mower stopping after running awhile. I noticed that the plastic gas tank was collapsing. The next time it began to stall, I immediately loosened the gas cap and it didn't stall. The vent holes in the cap had plugged up. Check this out.
I can't help you locate the fuel leak, although it sounds like the carburetor float is not stopping gas from flowing into the carburetor.

Posted on Dec 02, 2010

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SOURCE: My almost new Craftsman Lawnmower (190cc Honda

Take it back to Sears and let them repair it under warrenty

Posted on May 25, 2011

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1 Answer

I was mowing Yest and White smoke started pouring out the Front Could that be bad gas or what

no its not gas. it could be a few things. look on the front of engine and see if it is leaking oil on the muffler. could be rings are bad. could be a valve has stuck. either way it sound like it is a project. when white smoke comes out exhaust it is usually engine failure.

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First you need resolve the carburetor issue. With it leaking fuel it can flooding the engine causing it to smoke. The leaking can dilute the engine oil by overfilling the crankcase causing smoking and other damage, Once carburetor issue is resolve and it still smokes the initial 10 minute start-up after the rebuild then a compression and leak down will need to done to determine if you have blown head gasket, bad rings, or other problems.

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Sounds like a leaking valve cover gasket. The parts are around $50 to do both cylinder heads from It's not a major issue, but it may be a sore point to a potential buyer.

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