Can't really answer your questions. Warrenty work would depend on dealer. Bow rails seem to be pretty standard on many 170CC's, however, I opted for trolling motor. I have same concern about power. I opted for 60 etec Evinrude. You didn't specify horsepower, but I'm assuming it's 75 four stroke. I am sure it's ample for the boat, even with a couple of adults. I guess I opted for economy and purchase price over speed and power.