New to forum.I recently bought from a dealer.He replaced the fuel canister on the transom,then I cleaned the fuel tank and put in new fuel.Runs perfect for 3 25 gallon tanks.Then had to idle to the dock,wont take throttle,just dies when you gas it. It has never ran hot,and when this happened,the oil tank was three fourths full.filled to top,no difference.what to check next?