Boatjob1

Same problem on one of mine a couple of years ago. After a week of aggravation I found that there is a spring and ball bearing rig that is screwed into the fuel tank inside of the male fitting where the fuel hose clamps on. The CG calls it an "anti-syphon valve". MY quick fix (after getting stranded twice) was to unscrew this male fitting, take a small (6") phillips head screw driver insert it into the end were the hose meets the male side and pop the base of the screw driver on the concreet. The spring and the ball come flying out. I am not recommending this only sharing my experience, but I will tell you that I NEVER had this trouble again. This item is a factory install that is added on so that supposedley the fuelwill not syphon directly overboard through the engine while the engine is off. Not sure if this is what's going on with your situation, but thought I would give ya a heads up as I thought it was a mechanical problem on a new engine when it was not..... Good luck, T