Df 140 fuel problem

[cozysj]

I have a 2013 Df 140 that I purchased new. About 4 months ago it would run a few minuets and run out of fuel I'd pump the primer bulb and it would start and run a couple hundred yards so I changed fuel lines, both filters, primer bulb, all new clamps, and puled pickup tube and checked that, and the vent, it ran great until a week ago and now it runs great for ten minuets and runs out of fuel and won't start until I pump up the primer bulb and it will go great for another ten min. or so and same thing. The primer bulb will be soft and pumps up easy

[artdf175]

This really sounds like a tank venting problem
Some tanks have an anti-siphon device It had been mentioned here several times about removing the restrictor
Also check the air vent - it had been know that spiders and the like make homes in these small vent holes
I had a problem like the latter and used compressed air to blow out the vent
Art

[catacom225]

Hi Cozysj, I would run it on a separate tank with fresh fuel so you can determine whether its an engine problem or a a fuel or fuel tank related problem