You Do Need power plug adapter while traveling from Isle of Man to Morocco.

Here is Why You Need An Adapter

The outlet and plug type used in Morocco are C and E and in Isle of Man are C and G. This is how they look like.

Isle of Man

In Isle of Man, outlets of type C and G are in use.

Type C

Type G

Morocco

In Morocco, outlets of type C and E are in use.

Type C

Type E