My brother-in-law has a 25hp Yamaha outboard. I think it is a 2006 model.It is like brand new. I think he has run it maybe 25 minutes since he bought it. He has health issues and has not been able to use his boat. I have been helping him with things and he wants to hear it run. I tried to crank it but it would not start up. It is not electric start. I think it is not getting spark. I pulled a plug and it is getting gas. But no spark. It has a clip snapped on the motor for the kill switch. Any ideas?