2 things to check. Loosen the gas cap and see if that helps. If so, it’s the cap vent assuming you have it screwed open. If that doesn’t work check the screen filter which is screwed into the tank. The gas line attaches to it. I have found the screen plugged on a couple of my motors.

Well mercuryman, thanks for giving me something to lay awake thinking about. Not being sarcastic, I have pondered about this subject before, as I’ve encountered it on some of my motors and it has baffled me. I’m not smart enough to figure it out. I’m thinking it has something to do with our modern fuels being blocked by the filter until the filter is wetted all the way through. Then once wet, the fuel flows through just fine. I’m also thinking the extremely low fuel pressure created by only an inch or so depth of fuel in the tank (gravity) has something to do with it. Anybody else got any opinion? BTW, I only use 100% Synthetic TCW-3 oil if that means anything.

mercuryman, as I told you on the phone, I don’t think you have a carb venting problem. Don’t be surprised if it isn’t fixed. If it is fixed, well praise the Lord.

• This reply was modified 4 years, 3 months ago by frankr.