1. Use a pair of pliers. Gently grab the dipstick with a pair of pliers and turn it counterclockwise. Be careful not to apply too much pressure, as you could damage the dipstick or the oil pan.
2. Use a penetrating oil. Apply a penetrating oil, such as WD-40, to the dipstick and let it sit for a few minutes. This can help to loosen any rust or debris that may be holding the dipstick in place.
3. Use a heat gun or blow dryer. Gently heat the dipstick with a heat gun or blow dryer on the low setting. This can help to expand the dipstick and make it easier to remove.
4. Tap the dipstick. Use a rubber mallet or other soft object to gently tap the dipstick. This can help to loosen any debris that may be holding the dipstick in place.
5. Use a pry bar. If all else fails, you can use a pry bar to pry the dipstick out of the oil pan. Be very careful not to damage the oil pan or the dipstick.
Here are some additional tips that may be helpful:
* Make sure that the lawnmower is turned off and that the engine is cool before you attempt to remove the dipstick.
* If the dipstick is still stuck after trying all of the above methods, you may need to take it to a mower repair shop for assistance.
* Be careful not to lose the dipstick. If you do, you will need to replace it before you can operate the lawnmower.
Here is a YouTube video that demonstrates how to remove a stuck oil dipstick:
https://www.youtube.com/watch?v=zQh1oB6_9jM
