  We study the solar wind helium-to-hydrogen abundance's ($A_\mathrm{He}$)
relationship to solar cycle onset. Using OMNI/Lo data, we show that
$A_\mathrm{He}$ increases prior to sunspot number (SSN) minima. We also
identify a rapid depletion and recovery in $A_\mathrm{He}$ that occurs directly
prior to cycle onset. This $A_\mathrm{He}$ Shutoff happens at approximately the
same time across solar wind speeds ($v_\mathrm{sw}$), implying that it is
formed by a mechanism distinct from the one that drives $A_\mathrm{He}$'s solar
cycle scale variation and $v_\mathrm{sw}$-dependent phase offset with respect
to SSN. The time between successive $A_\mathrm{He}$ shutoffs is typically on
the order of the corresponding solar cycle length. Using Brightpoint (BP)
measurements to provide context, we infer that this shutoff is likely related
to the overlap of adjacent solar cycles and the equatorial flux cancelation of
the older, extended solar cycle during Solar Minima.
