i have a 40hp merc model c40ELPTO, its a 4 cylinder 2 stroke on a pontoon. From my research, bigfoots are mostly used on pontoons, and I found one website that said the way to tell the 40hp bigfoot from non-bigfoot, is that the bigfoot has 4 cylinders and the non-bigfoot does not.... is this true? I only found that in one place, so I'm guessing thats wrong, but you never know.