Engin mount rubbers

[Gerhard Rieger]

There are two different hole sizes for the engin rubbers that connect the engin to the airframe mount. Which one is preferred and what is the benefits either.way

[Mark Goldberg]

The 2" ID hole is a Type II Dynafocal. The 1 3/8" ID hole is for a Type I Dynafocal. Theoretically, the Type II has less vibration. But I have flown in both and can not feel any difference. It is possible that some instrument that senses vibration could measure a difference. But I doubt a human can. That is my experience. Mark

[Gerhard Rieger]

Thank you Mark, do you have the Lord part number for the 1-3/8 ID hole, Type 1 Dynafocal. Hope to attach the engin soon.

[jaredyates]

It's fresh on my mind, I just had to order a set. Barry #94110-01 Lord #J-3804-20

[Gerhard Rieger]

Thanks Jared. Enjoy