Sometime it sparks and sometimes it dosen't. I have been having trouble starting usually after the motor has been sitting for a week. After one start she'll start right up. Well after not getting that initial start and replacing the starter I called my mechanic who told me I had now spark or a bit out of the mid cyl. starboard side. He pulled the harness and checked each cyl. After a few day I went and tried to start it, well after a bit it did start. I ran it for 30min. then restarted it with no problem over and over. No problem? Well next day no start just a spit. What the heck. Please any help is very much appreciated. Thanks