Thanks for the tips. About that poly line from the lawnmower shop...I went to my local rental shop looking for small diameter fuel hose for return lines and they showed me this orange (I think) colored line they use for all their equipment. Said it was great stuff. But, they didn't know whether it would stand up to the alcohol in B99.

Has anyone actually used that colored poly line on their return lines with biodiesel? Just curious.

I would have thought the new NAPA line would have been fine, as I thought all fuel lines post 1996 or something were made with synthetic rubber and thus B99 compatible. They sure do seem to be softening and weeping fuel though.

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Where there's a will there's a way
1978 300D