OS makes many times more engines than YS does. The percentage of OS to YS .50 size engines is probably over 500 to 1. Judging by the availability issue alone, it's clear that OS makes many more than YS do. Let's not even begin to look at the range of engines that OS produces in comparison to YS. YS engines are made in vastly smaller numbers and consequently, IMHO, from having rebuilt a ton of YS 80's and YS 91's, the machining on the OS is much better than the YS.
Even though I had a problem with mine, I'd still pick a YS50 anyday of the week over a OS 50. I got an OS Hyper 50 in mine now, and it doesn't even have close to the power of YS. Can't wait to take it out and get my YS50 back.
You got one thing right, you had a problem and it wasn't the engine, it was you. With 1 gallon or less through the only nitro engine you've ever owned, we're supposed to take your opinion over others? The video shows that you can't tune an engine and don't know when its running lean or not. That engine was laboring, choking and puking right before it died and you killed it. When you run an engine that lean it makes lots of power right up to the point it dies a tragic death.
I burn on average over 40 gallons of 30% a year. I didn't do that this year due to personal reasons but most years I do. I have 55 gallons of Magnum in my basement ready for next year. The fact is that the YS 50 doesn't make anymore power than the OS does. The fuel delivery system might be a little different but the power output difference is like picking flysh*t out of pepper. If there was any reason to own a YS, I would have one but the fact is that there simply isn't any reason to buy a boutique engine when OS engines can be had off of the shelf that run like scalded dogs and last.
Get someone that knows how to tune an engine and setup a heli to work on yours. The difference will be night and day. What was in the video tape wasn't working.
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AMA SECTION 336 = Good
Drones = EVIL