We report the synthesis and properties of (H,Li)₆Ru₂O₆, which is shown to be a 𝐽_eff=1/2 system made out of Ru³⁺ moments in a honeycomb geometry. Bulk magnetization, heat capacity, nuclear magnetic resonance (NMR), and muon spin relaxation rule out the presence of static moments or any spin glass phase down to 84 mK. All techniques suggest a crossover to a liquidlike state below about 40 K. The ⁷Li NMR shift data suggest a nonzero 𝑇-independent spin susceptibility at low 𝑇. In zero field, 𝐶_𝑚/𝑇 shows 𝑇^−0.9 divergence which is consistent with vacancy-induced effects on low-energy excitations of the pristine Kitaev spin liquid. With field, power-law variations in the ⁷Li NMR spin-lattice relaxation rate 1/𝑇₁ and magnetic heat capacity 𝐶_𝑚 show quantitatively different scaling behaviors as compared to those in H_3⁡LiIr₂⁢O₆. A two-step entropy release in heat capacity is also observed putatively from 𝑍₂ flux (low-𝑇 step) and itinerant Majorana fermions (high-𝑇 step). Based on these findings, we propose that (H,Li)₆Ru₂O₆ realizes a Kitaev spin liquid with no evidence of inherent magnetic ordering in zero field unlike 𝛼−RuCl₃ where an 8-T field is required to suppress magnetic order.