I would want to be sure to use re-enforced or braided fuel line as there will be pressure there from the fuel pump. Would not trust zip ties for that same reason. Keep in mind if the hose springs a leak that fuel pump is going to keep pumping fuel and a boat is not a place to have a serious fuel leak, especially under pressure. Next you might want to check and see if rubber fuel line is Coast Guard approved. If it is not approved and you have a fire, your insurance may very well not cover it. You may find some fine print in your policy about non-approved modifications! Not that big a deal to bend a steel fuel line or just buy a replacement, if factory they can have one to you overnite if you need it that bad. UPS and FedEx do it everyday.