Gas in oil

Glad to hear she is running.

Does this have a good paper fuel filter on her? Good clamps on both sides? New fuel line from tank to carb?

Do you have an old fuel can with say maybe an open top? If so, get a new style spout. You can buy just a spout. Help keep trash and water out of your fuel. Once your can fills with debris, you pass it to your mower. Grass clippings, hornets, dirt dobbers, leaves, WATER and so on LOL. I feel they keep the fuel fresher as well. Below the picture is the Briggs spout. Don't get some other cheap POS from Scamazon or Fleabay.

Inline fuel shutoff valve? Install and use it or if you don't have one get one.
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slomo said:
What was the fix action? Dirty carb?
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Well still have problem once in a while. After shutting down and let it sit, will hydrolock with a cup of gas coming out of spark plug hole once I pull plug. Am confused. Some how think fuel getting to engine thru pulse line. Have already gone thru carb even tried new carb.
 
The Fuel Pump Impulse hose will fill the crankcase not the cylinder when the diaphragm is leaking.

Needle seat could still be leaking. Just did a Kohler CV with a carb with none replaceable seat, it gave me fits because had micro imperfection. It took 3 tries with the counter sink to get it to hold 10 psi for 30 minutes.

The first time I did a quick check and it passed but a few days later while loading the mower for the customer the engine started flooding. So that why I go lick my calf over a couple more times at the bench before I felt it would hold.
 
StarTech said:
The Fuel Pump Impulse hose will fill the crankcase not the cylinder when the diaphragm is leaking.

Needle seat could still be leaking. Just did a Kohler CV with a carb with none replaceable seat, it gave me fits because had micro imperfection. It took 3 tries with the counter sink to get it to hold 10 psi for 30 minutes.

The first time I did a quick check and it passed but a few days later while loading the mower for the customer the engine started flooding. So that why I go lick my calf over a couple more times at the bench before I felt it would hold.
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Thank you, will pressure test needle and seat
 
Do NOT run the machine with fuel diluted oil. Fix the carb then dump the oil every mow a few times. Gas can/will turn a 30W oil into water viscosity wise.
 
kenneth2 said:
We have had a recurring issue with a Scag 48 with a Kawasaki fs548v engine. Twice it has started to run rough and died. Gas was 3 or 4 inches up in the dipstick and fuel was leaking out of the muffler. Took carb apart and cleaned thinking needle was stuck. Did an oil change and it was fine for a week but has happened again. Compression is even on both cylinders it is only 70 psi but manual says minimum is 65 psi. Leaning on a new aftermarket carb. Was thinking possibly fuel pump. Is there a way to test with a vacuum pump?
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And you can install a manual fuel shut off valve between tank and the fuel pump. This is probably the cheapest most reliable method of controlling this problem..
 
I had the same on an edger. Drove me nuts trying to solve it. After I added a shutoff valve, and started running it dry before storing it, it came to me that it started about the time I replaced the fuel cap. The new cap did not vent like it was designed, so that pressure would build up in the tank on warm days, and force its way past the needle and seat.
 
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