Gasoline and oil mixture in crankcase

Drain the crankcase via the bottom most plug. Refill based on full mark on the oil level dip stick. An over full condition can result in hydro-lock of the engine causing internal damage. Do not overfill engine oil

You may have overfilled your oil tank. Always check your oil level with the engine at full operating temperature. Avoid the temptation to "top it off" when you check it cold. As long as you can see the oil on the dipstick, start the engine and run it until it's warm. Then only add oil if it's below the lower line. Check the oil level of your Fat Boy with the bike on the side stand. Your Harley has a "dry sump" type oiling system on it as it pumps oil into the engine that lubricates things and then pumps it back out into the oil tank. It does not carry the oil in the crankcase like other machines. It will run fine with as little as one quart in the tank but this may not give the oil sufficient time to cool and I don't advise that. On the other hand, don't overfill the tank as you leave too little air space in the tank for the crankcase to vent the pressure. The only other thing I can think of is to smell the oil and see if there's gasoline in it. If so, you may have a leaking carburetor diluting your oil with gasoline.

Good Luck
Steve

Sounds like Carb float stuck lightly tap on bottom of carb and wait a minute to see if it stops...

Check your oil level. If it is too high, your oil may be full of gasoline. Your vacuum petcock may be leaking gas past a diaphragm or your float bowl needles are sticking and are over flowing gas into the engine. This causes your oil to be diluted with gas, the crankcase becomes too full, and the gasoline diluted oil is then blowing through the breather tube and into the air box. Needles sticking in the carburetors can happen at any time even to new motorcycles. If you have vacuum petcocks inspect the vacuum diaphragms for leaking. Clean the carburetors and replace the float needles if they show wear. Change the gas fouled oil and filter. Change your air filter if it is paper and has become oil fouled. Hope this helps.

It depends, Toro made 2 cycle and 4 cycle Mowers......Look and see if there is a oil dipstick,If so it is a 4cycle , If no dipstick or plug at crankcase to check oil then it's a 2 cycle

First check to see if the oil level in your crankcase is too high. If you have a vacuum petcock malfunction (hole in the diaphragm) or if the fuel petcock is left in the prime position and a float needle sticks, then you get you get gas running into the cylinders, past the rings, and into the oil.
When you start your motorcycle the oil/gas mixture has no place to go, the crankcase is too full, and the mixture exits through the crankcase breather into the air box where it will ruin a paper air filter. Always turn your fuel petcocks off when not driving. If the petcock diaphragms are bad rebuild the petcock with K&L rebuild kits or replace the fuel petcocks with new ones. If the float needles in the carburetors are bad or sticking, take the carburetors apart, clean them, and replace any worn or damaged parts You will have to change your gasoline saturated oil for it will no longer properly lubricate your motor.

If you have a vacuum petcock malfunction (hole in the diaphragm) or if the fuel petcock is left in the prime position and a float needle sticks, then you get you get gas running into the cylinders, past the rings, and into the oil. When you start your motorcycle the oil/gas mixture has no place to go, the crankcase is too full, and the mixture exits through the crankcase breather into the air box where it will ruin a paper air filter. Always turn your fuel petcocks off when not driving. If the petcock diaphragms are bad rebuild the petcock with K&L rebuild kits or replace the fuel petcocks with new ones. If the float needles in the carburetors are bad or sticking, take the carburetors apart, clean them, and replace any worn or damaged parts You will have to change your gasoline saturated oil for it will no longer properly lubricate your motor.

You may have put in too much oil. Check the oil level dipstick and see if the oil level is above the full mark. If so, you'll have to drain some out until it is down to the full mark. Too much oil will block engine crankcase venting passages and lead to pressurization of the crankcase.

If the oil level checks out okay, check for a stuck positive crankcase ventilation valve (PCV). If the crankcase cannot vent blowby gases, it will pressurize and oil will be forced past the intake and exhaust valve guide seals causing heavy oil burning. The engine will also run terrible.

It is not unusual for the crankcase oil to smell like gasoline. What you should take note of is if the crankcase oil level increases by any noticeable amount. This would be caused by the carburetors overflowing and allowing gasoline to run through open intake valves, into the cylinders and then past the rings. Still, this is a very unlikely scenario given the fact that your bike has a vaccuum actuated petcock.

The botttom line is this; don't worry. Small amounts of gasoline that may present in the crankcase oil is going to quickly evaporate once the engine is up to operating temperature.

Check the piston rings and the valves. One of them is leaking.If you run the machine as is it will soon break down altogether...Lee