If it is full to the filler cap it must be diesel getting in the crankcase, on your fuel pump there should be a thumb lever to manually prime fuel after changing fuel filters etc. With the engine shut off, pull the dipstick or the fill cap and manually pump fuel, if the crankcase overflows then your fuel pump diaphragm is probably bad which is cheap fix plus oil change. If it is internal engine problem -- rings, piston or something then there should be other symptoms -- rough running, obvious smoking -- it could be the injector pump gear seals but then it should run weak and be hard to crank.I would advise against running the engine very much until you figure it out because the diesel will lower your oil viscosity.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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