I am looking to buy a nissan 5 horse 4 stroke for a troller motor only. Wondering of those who have em like them. What is most important to me is quiet smooth (very little vibration). That model is a 1 piston engine, is that style liable to vibrate more? Prefer nissan for this motor for no other reason then to match my 40 2 stroke nissan tiller, which I am very pleased with.