2.0 head help

i have a 2.0 ho that keeps jumping time i think the head is off of a 2.2. are the heads interchangable? or do i have another problem

yes the heads are interchangeable. You may need a new tensioner or a new belt. the pulley may need swapped out if you just changed it. some belts have rounded teeth and some have square shaped teeth. Let us know when you figure it out.