I'm wondering if there is a difference between plastic and metal fuel tanks for an outboard? (aside from the cost). I have a few plastic ones and I'm noticing they are collapsing (not completely) while operating my engine. Would this contribute to my Evinrude stalling at low idle every now and then? Should I invest in an OMC metal tank?<br /><br />Thanks for your help,<br />pfistey1