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Craftsman Lawn Tractor, 16 hp Briggs


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09-15-12, 12:19 PM   #1  
Craftsman Lawn Tractor, 16 hp Briggs

I have a 16 hp briggs engine, model 283H07, type 0399-E1.
the problem is I have gas in the oil . Even with this problem the mower still ran good until last week. Now it is smoking and blowing gas and oil out the muffler, runs smooth then starts running rough. I started to look for the problem and found out that gas was in the breather tube that connects to the air intake elbow, and the elbow was full of gas. Could this be a clogged breather or is it another problem. Please Help!
Thanks! dshearer

 
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09-15-12, 05:30 PM   #2  
The carburetor is leaking. Take the bowl off and clean it out, clean the needle/seat area, and if this has the plastic white insert in the bowl, replace the o-ring gaskets between the white piece and the carb body. Don't keep running the engine with gas in the oil or you will ruin it.


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05-04-13, 08:28 AM   #3  
Hi, Cheese!
Sorry it took so long, but I just rebuilt the carb and cleaned it and changed the oil. I started the motor and it ran good, but gas got into the oil again! What the heck is going on? Please help if you can. Thanks! dshearer

 
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05-04-13, 11:45 AM   #4  
Did your carb have the white plastic insert in the bowl, or was the whole carb metal (other than the float)?


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05-05-13, 07:51 AM   #5  
No! Could the fuel solenoid not be working to cause this problem, and how would I check to see if it is working?

 
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05-05-13, 10:27 AM   #6  
The solenoid doesn't have anything to do with it. It moves when the key is turned on or off. Your float needle is leaking.


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05-05-13, 11:11 AM   #7  
When I rebuilt the carb, the kit came with a new replacement inlet seat, but I couldn't get the old one out. So I left the old one in. How do you get the old seat out? I guess I shouln't have gotten in a hurry. Your help is greatly appreciated!

 
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05-05-13, 06:20 PM   #8  
The seat rarely needs replacing. Usually it just needs cleaning. Use a q-tip with some rubbing or polishing compound, or even comet on it and twist it in the seat while pushing it in to clean the varnish and corrosion off of it. This usually fixes it. Replacing the seat could cause more problems than it fixes.


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05-26-13, 07:47 AM   #9  
Cheese, I did what you said with comet and a Qtip. Then I reassembled everything, and changed oil. Then started the mower. It ran good so I mowed the yard. Then I checked the oil and it was ok. A couple days later I started to smell gas in the garage. I checked the mower and the carb was full of gas. The oil had no gas in it, which was great! I started to do further checking and the cylinder was full of gas also. So what the heck is going on? What should I do now?

 
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05-26-13, 10:56 AM   #10  
I assume you put a new needle valve in it when you built it? Was it an original briggs part, or aftermarket? Did the seat look nice and shiny when you cleaned it? You might try polishing it again, but once in a while the seat just won't stop leaking and it requires replacement. Not often, but I find a couple every year.


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05-26-13, 12:23 PM   #11  
Do yourself a favor and just replace the seat!! I use a 1/4x20 tap to get it out. Run tap in until old seat starts to turn and while turning pull up. To get new seat in I use a drill press with a piece of hard plastic on top, and the new brass seat will press right in. When it stops, you stop, do not try excessive force. If it is not a brass seat and it is the plasic piece like Cheese had mentioned, you may have a broken o-ring or the seat will not clean. Replace the entire plastic piece, it's pricey but that will fix it.!

 
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05-26-13, 03:46 PM   #12  
I did put a new needle valve in, and it was a original briggs part. The seat does look worn, so I will replace it. A member has suggested using a 1/4-20 tap to get the seat out, what do you think? Or do you have a better way to get it out? Again Thanks !

 
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05-26-13, 06:40 PM   #13  
That will work. I usually use a self tapping bolt, but I see no reason a tap wouldn't do fine.


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06-22-13, 08:29 AM   #14  
Hi Cheese,
I finally got the seat out, I used a 1/4-20 tap, but it did not work. So I used a easy out and it worked great ! I put in the new seat and reassembled everything and the engine runs great ! No gas in oil. Thanks for all your help on my problem!
Thanks ! Again
dshearer

 
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06-22-13, 09:38 AM   #15  
Glad you got it and thanks for the update!


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