I have a 9.9 that won't start after sitting for a month or so. This has happened before and I had a mechanic check it out. He checked all electrical components because I was not getting spark, but found nothing wrong. After putting it all back together, she started right up. He said it was probably a loose wire. If I tried to start it within a week or so it would start right up. After a longer period, it would not. I would then disconnect all wires and re-connect them again and it would start. Now that I have a buyer she won't start at all. I tried cleaning all connections with electrical spray cleaner, but she will not start. The battery is strong, there is just no spark. Any ideas would greatly be appreciated.