4-Stroke not firing on 1 cylinder

[KennyBradley]

Hi,<br /><br />I'm tring to diagnose a problem with my 2001 Yamaha 30hp 4-stroke. I can't get any spark on the middle cylinder.<br /><br />I've tried swapping coils and checking the condition of the wiring back to the CDi without success. Can anyone help with any tips on what to look for next?<br /><br />Any help would be much appriciated.<br /><br />Cheers Kenny

 

[J00ky123]

Re: 4-Stroke not firing on 1 cylinder

bad plug?

 

[KennyBradley]

Re: 4-Stroke not firing on 1 cylinder

Thanks for the Reply JOOky123.<br /><br />Unfortunatley I have tried swapping plugs and coils without success. Any other ideas?<br /><br />Cheers Kenny