Cartoo were teen gets into a robot touches a crystal and becomes a robot but can only be in that form for 8 min if he does not transform back he goes carzy

Maybe,.

Teknoman
a.k.a. Tekkaman

The cartoon takes place in the year 2087, the earth is being invaded by an evil army under the control of the Venemoid Warlord Darkon. Earth's military is overwhelmed until a young man named Blade/Slade is found in the wreckage of a spaceship. He has amnesia and doesn't remember anything about his past. Blade/Slade has a crystal that gives him superstrength and allows him to transform into an armored cybernetic superwarrior. He decides that he must use his powers to help defend humankind against the enemies of Earth. He's not able to remain Teknoman for long though. If he stays in his armored form too long there is a risk that he may lose his mind and become a danger his friends.