hello all, i have a 99 2.5 175 mercury in a jetboat. when i try to start the motor after it has been sitting, it will cank but i have no spark. then about after 10 minutes of cranking i will get spark. once it starts it will run fine, and if i shut it off, if i start i within 5 minutes i will sart right back up. let it sit for longer than 5 minutes, i will have no spark when i try to start it. any suggesions? stator is new. had same problem with old one.