I remember weighing our 149... with the tiller, full of fuel it was right at 1000lbs IIRC....
So ~200 lbs for a tiller = ~ 800 lbs.... a Quietline with more sheetmetal and the additional stuff under the hood... I could see that stuff be good for 40 or 50 lbs.... I always called it 1000 - 1100lbs no matter what, for safety factor when looking at ratings.....