Regulator Assembly by YS Engines

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YS Engines
YSE4155
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This is a YS factory replacement regulator assembly. This works with a wide variety of YS helicopter engines from older discontinued models, to current engines such as the 91 SR, 91 SR-3DS, 91 SRX Tareq, and 120 SR-X.

This product was added to our catalog on April 12, 2016