Plugger, if you read Bruce's post above you will see what has probably happened. If you have been leaving the fuel turned on when your mower is not running, and if the carburetor needle and seat is not closing properly, the result will be an overflowing float bowl. The surplus fuel will probably run out continuously through the main jet in the carburetor's venturi, along the intake pipe to the port, and thus into the crankcase. If that is happening you need to carry out a minor overhaul of your carburetor's float bowl, including the needle and seat. If the float is undamaged, you may just need to clean out the seat area and perhaps replace the needle. However Victa plastic carburetors are fairly strange, and you will need to either master them or get help, to reassemble the thing if you dismantle it beyond the float bowl (which is the problem area in this case). Once you stop the flooding you will still need to turn off the fuel tap when you are not using the mower - the Victa carburetor's plastic needle does not achieve a reliable seal, and cannot be relied on not to flood over a long period (hours or days) of not being used.
