I purchased a used 2001 1800 late this summer. It has ~13000 miles on it. The guy I bought it from told me not to fill the tank too full or I would have problems. Unfortunately he was right. When I fill the tank anywhere near the neck (and I'm careful not to fil it any higher) the engine cuts out off and on til I go about 20 miles, then it lines out and runs just fine. While it is cutting out, I can accelerate like crazy and it doesn't miss a beat, but as soon as I back off to cruise it starts cutting out again. One person told me to tighten the cap til it clicks... I do that. Has anyone else had this problem and if so, what did you do about it?