iam needing help . I have an 1980 evinrude 70 hp ELCS . when I start the motor it sounds good,Idles and idles good. when I start out of the wake and I go to throttle , it starts to shake cough, and sometimes it will kick in full power. Where it starts to cough, I can back out of the throttle a little and it will idle out and stay pretty good speed. Now if If I go to full throttle it does this often. I had somone that rebuilds car carbs/ rebuild my carbs. New Plugs. New Primer bulb. Kinda curious what the symptons of a BAD STATOR BAD COIL Or Low Compression on a cylinder is? By the way , New powerhouse / Motor Block ??? Evinrude in need of help ,can barely enjoy lake due to the boat having the flu ?