How much should I expect...

diymirage...check out my post of Jul. 16 2016 (do search with words....easy fix) about upgrading hose clamps and fuel hoses from regular (R7) to fuel injection hose (R9) and reasoning behind it. I upgraded all the hoses to R9 to head off any possible fuel line problems like you are now experiencing...the aggressive fuels we have today degrade R7 hose pretty quickly. Do it asap before it causes problems in your hard lines and/or carb. Hope this helps you and good luck...318MG

found your post
interesting read

so...the R9 hose will not collapse?