The photo below shows the original bilge pump line in the lazarette as it attaches to the through-hull very low in the transom. The section of the line shown in the lazarette is flex tubing. The section of the line in the cockpit locker (not shown) and part of the lazarette locker ( not shown) was schedule 40 PVC pipe.
I now have a Nissan 6 hp four stroke OB motor. The Honda in the photo is no longer operational.