Overfilled mower engine oil

I have my mower in the shop having all belts replaced. I borrowed my Father-in-laws ZTR mower. It has a 24 HP Kawasaki engine. I noticed a oil message on the digital display so I checked the oil level. The dipstick was very hard to read and I thought it was about 1/2 quart low according to what I saw. After adding 1/2 qt of oil and gassing it up, I started it up and began to continue mowing. All of a sudden my yard disappeared in a cloud of smoke. I headed back to my garage and it would run fine then start smoking again. I rechecked the oil level and it was overfilled. Since the engine was too hot to work with, I let it set overnight and will drain some oil back out later today. Other than having to burn the residue out of the muffler, do you think running it for less than a minute with too much oil will cause problems? It started right back up when I shut it off so I don't think oil got up into the carb.

Drain the excess oil out. Then put some seafoam in your gas and run the snot out of it....it will be ok.

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Also might want to clean the spark plug with carb cleaner.

Don't want to scare you but the only bad thing I have seen a few times in this situation is oil dosnt compress very well and can blow a head gasket. Just keep an eye on it after she is straightnd out for a seep around head. Like G said seafoam and run it will clean everything up.

You should be OK Doug. I have a mower that, on level ground, the oil level is perfect. When you get on a side hill, the oil in the tank will go to one side and start the bug fogging (smoke) machine! Too much oil can (at times) burn out a ring or a seal but I don't think that happened to you.

Some of these newer engines want less oil. Case in point is the yamaha 40hp I have. The mechanics, dealers, and even Yamaha says to leave the level of oil in the middle or below middle of the fill lines as they know the dipstick level lines are too high. You would think the simple rectification would be to re-engineer the lines on the plastic dipstick but.... that would make too much sense!

Thanks guys. I got the level down to 2/3 on the dipstick, didn't have Seafoam but put some Stabil in it, started it up to a little smoke till it burned out of the muffler, then mowed for 30 minutes with absolutely no issues. I think I dodged a bullet. I hate to borrow any piece of equipment from anybody. My Dad always said to return a borrowed item in better shape than you found it. I made sure there were no oil leaks or strange noises, gave it a good wipe-down then bath before I returned it.

BTW, after all this, the check oil display is still blinking.