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Fuel in the crankcase?
- Thread starter arch252
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Fuel pump, sorry, they said they had the fuel pump replaced, not fuel filter. I cleaned the carb, plastic float not metal. There is a small actuator type device on the bottom of the carb bowl, if it was stuck in the open or out position it would not allow any gas into the center chamber of the carb, if it was stuck in the "in" or back position then gas would overflow into the carb. There is a wire from that little actuator to the ignition panel. I don't know how to test to see if it is working correctly. I removed the fuel pump, and in spite of what those people were told, it had not been replaced. The diaphragm had some good cracks in it.
Could any of this be the culprit? I'm still having a hard time understanding how the fuel would get into the crankcase.
Could any of this be the culprit? I'm still having a hard time understanding how the fuel would get into the crankcase.
I just called up the blowup of your engine, and it has a mechanical fuel pump which could easily be your culprit!!!
I had that problem on my Kohler command. The diaphragm in the fuel pump had worn thin and gas would pass right through it into the crankcase. I changed fuel pumps and the problem was fixed.
That sounds like the problem then. So is there anywhere to get just the diaphragm? I've broken down the fuel pump and its a pretty simple swap I just can't find one. I hate to replace the entire fuel pump.
For small engines, gas in the oil is usually one of two things.
Most common, a stuck needle valve in the carb allowing gas to pour unchecked into the combustion chamber, where it seeps past the piston and into the crankcase. Usually when the engine is not running. Many recommend a fuel line shutoff be put in line to stop this if you can't easily or quickly correct this problem in the carb.
Much less common, severely worn piston rings allowing some fuel to enter the crankcase.
There may be other issues with that engine I am not aware of, but these are the common causes of gas in crankcase oil that I have been exposed to. Whatever the case, it is obviously not a good thing to have gas in your crankcase oil. You need to address this, as you are doing, and remedy the situation quickly. Don't allow the engine to run with gas in the crankcase.
Good luck.
Typically, that's usually the problem. (The stuck needle valve in the carb)
I had a Neiko carb on my engine, and although the needle LOOKS good, it was plastic-tipped, and when the plastic hardens with age, it will not seat tightly enough to keep the fuel from over-flowing the bowl, and I've had the crankcase fill to the extent that it filled all the way to the bottom of the intake manifold.
Good answer.
That sounds like the problem then. So is there anywhere to get just the diaphragm? I've broken down the fuel pump and its a pretty simple swap I just can't find one. I hate to replace the entire fuel pump.
I thought the same thing. The diaphragm was easily removed, but I couldn't find a replacement so a new pump was my only choice.