You should double check but I believe you are (or should be) running a 3/8" id line on those 150s.I have my controls (including the fuel line) covered with a plastic split loom to offer some protection and order.The loom is good for several years and then I replace. Bought it online. If (when) I work on the rigging, I'll use a solid tubing to protect the wires/control lines.Good luck.
Great day in the morning when did fuel line become so expensive?? $5.50 a foot for 3/8" fuel line. $22 each for new prime bulbs. I guess they're still using up the high priced oil in making the rubber parts and haven't gotten to the cheap oil in inventory yet!!