Stairmaster: Repost from Motivation

After some thought, I thought this question is more suited for this thread.

I'm super scared that once I get on the stairmaster that the belt will break because it can't hold my weight. I'm 350 and I'm just wondering if there's a weight limit? Should I try it? or wait until I lose 50 pounds? it is one of those stairmasters that has a belt instead of those fancy stair cases. Maybe its not a belt? It looks like this

http://www.amazon.com/StairMaster-SC916-Stepper/dp/B001S7DQDC/ref=sr_1_7?s=sporting-goods&ie=UTF8&qid=1363263152&sr=1-7

And that as a 300 weight limit
I'm just getting bored of doing bikes, elliptical, and treadmill and I want to challenge myself with rowing and stairmaster. But I'm just worried it might break :S