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Engine Manual

The original YS63 was a great engine.  The YS 63-S is better.

The YS 63-S is redesigned to run even better under the toughest conditions. The regulator has been repositioned to run cooler in harsh environments.

The lower crankcase is stronger to prevent distortion from high pressure. The new cylinder has no liner, transferring heat better. The YS-63S is better, more reliable under a wide range of conditions.

#YSE0064     $239.87  Status:  In Stock