I had trouble finding the 5/16'' fittings when I needed them, too. What I found was that most auto parts stores had a spot for them in a bin or tray, but that it had been empty for some time and it was ''too much trouble to re-order them because nobody needs those any more, those were for OLD CARS.'' Special order only.I finally found an Auto-Zone where the manager took great pride in staying caught up on her inventory, and SHE had them in stock. I could have hugged her (tall good-looking blonde, too). As for your replacement line not fitting, I had a similar problem with a Tisco fuel line. It simply isn't formed correctly. You can easily see the mistakes they made if you compare it to the drawing in the parts book. If yours is a Tisco line from the same production run, this is likely your problem, also. I needed to get the tractor running again (you have to run them to keep them running), and finally went with a neoprene line that was SPECIFICALLY DESIGNED for fuel delivery. I routed it very carefully to keep it away from the exhaust manifold. But that's a short-term solution. The long term one is to buy and bend some steel line myself. I've done a little metal working before: but unfortunately it was mostly metal buildings and radio chassis and cabinets, not brake or air lines. As a result I have ruined several lenghts of line but have yet to produce a fuel line that fits right and looks good. When I finally do, the neoprene one comes off.
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