I have a 2000 Yamaha 15hp 4 stroke electric start i am not getting any fire to my plugs i have checked the kill switch and it is fine and working like it is suppose to. Is there a way to check the coil or is there anything elec i should check. I have checked the fuses and all wires are plugged up and everything elec looks good. The problem started Saturday morning and i pulled the boat back out and played with it for a while and got it to run dont know what i did to it but it ran great all day long. Now today i go to crank it and it will not start again and i pulled the plugs and they look good but are not getting any fire.