Problem with Evinrude 40hp 1995

[96chevs10]

I try to start the motor and i

I try to start the motor and it wants to start but does not actually turn over. What could be the problem. Any suggestions will help! Thanks

 

[cehmass]

"you crank it with the starter

"you crank it with the starter ,but it does not fire,.......................
check your spark it should jump 7/16 of an inch
a strong blue arc is what you need.
check compression,fuel."