i have an 06 nitro 929 cdx with a 225 opti and it cuts out at wide open throttle i've taken it to the shop and the plugged it in and found nothing so i brought it home and changed the fuel filter and found alot of varnish in it and still does the same thing do you think it could be the fuel line oh yeah and bye the way it is a low hour boat only 113 hrs on it