Will my visa be revoked if I marry an American in my country or will I have any issues at the US airports?

Merely marrying an American citizen is not a sufficient reason for your visa to be revoked unless immigration accuses you of having a preconceived intent to permanently remain in the US when you visit.

You can marry your US citizen spouse and reside outside the US with him. Also, you should be able to come to the US occasionally as a tourist visitor. But, when you enter the US as a visitor, the fact of your marriage may raise the issue of your intent. On such occasions, you must be able to prove to the border inspector , (a) yes, I am married to my US citizen husband; (b) yes, I know that he can file green card for me: (c ) no, I do not intend to file green card and (d) yes, I'd like to remain overseas with him. You will be required to prove that you and your husband have a home and strong ties outside the US and that you have no intention of abandoning those ties overseas.

As long as you have proof that you have no immigrant intent and proof that you are residing in your home country, you should not have any issues with visiting the US.