Going to highjack my own thread a little bit. I've also been having issues with vapor lock? Cold starting is no problem, I'll run the boat for a while, it will get up to operating temp. When I go to start it 10-60min later, the motor turns over, but will not start. The only way I can seem to get it to start when warm is at WOT. Any ideas?
'01 X-9, mid-ship LTR 330HP (5.7L GM Vortec), Northstar Ignition.