My fathers boat motor was rebuilt and ran great then last year the fogging oil part broke this part was replaced but shortly after the boat began to loose power it seemed to surge and die gas had been spraying allover under the cover when the part broke my guess is there is debres in the fuel filter from the broken part orthat the air filter became clogged after being sprayed with oily gas note that the oil mixing system was removed so premixed gas could be used this was done at the repair shop