RE: Sundowner 50 and YS 110 need help
I wouldn't use a vibration mount that small for a YS 110, you'll probably end up tearing the isolators out of it and have a VERY soft mounted engine! I think you're going to have prop clearance issues with that engine as well, that's a HUGE engine for a 50 size plane, you'd be further ahead with a hot 2 stroke 60 like a Jett or something.