my 1996 150 yamaha has a funny problem...<br />when i cold start, i have no problem idleing out of the channel....after running at about 4000 rpms for a good 20 minutes, i drop back to idle, and i have a severe sputtering problem. when i try to speed up, it runs very rough until i get to about 2500 rpm....i thought about water in the fuel, but it checked out ok. the funny thing is that it only does it in the water (under a load). i can run on the muffs all day and it wont happen.<br /><br />any clues, guys??????
