You Do Need power plug adapter while traveling from Israel to San Marino.

Here is Why You Need An Adapter

The outlet and plug type used in San Marino are C, F and L and in Israel are C and H. This is how they look like.

Israel

In Israel, outlets of type C and H are in use.

Type C

Type H

San Marino

In San Marino, outlets of type C, F and L are in use.

Type C

Type F

Type L