I have a 140 and a 5hp. The 140 smoked like crazy when new and the dealer turned the pump down, I turned it down more, and continued to check the oil usuage at way more than 50:1. I tweaked the linkage mount alitlle till it was right at 50:1. It's been great even since and never missed a beat even trolling it. I will say that my old big cubic inch 'rude 90/115 pulled just as big of prop and yanked ski-ers up as well as the smaller ci 140 'hatsu. The 5hp longshaft is a putt-putt single cyl and shakes more than the small twins but will troll down so low you can count the strokes, all day, on sips of gas. I'd buy another one if the price was right. I'm really liking the 4 strokes though.