Just got our hands on a 03 Yamaha gp1300R it was a fresh water ski till now. It had 140 hours on it now has around 150 and we are having issues with it cutting out and surging while trying to get going. It always runs just now past idle. Sometime the issue happens right away other times it will run for a while. I did at one time get and error code 66, but that doesn't always come up. Ski was running great right up till it did this. Looks like the cat was already replaced since it has the cap/resistor on the cat sensor. Any help on where I should go with this issue would be greatly appreciated. I do have the service manual but looking for a place to start. Thanks!