Measurements on density and viscosity at atmospheric pressure for the ternary system 1,2,3,4-tetrahydronaphthalene (1) + isopropylcyclohexane (2) + cyclopropanemethanol (3) and three corresponding binary systems from (293.15 to 343.15) K have been carried out over the whole composition range. The excess molar volumes (V-m(E)) and viscosity deviations (Delta eta) of the ternary system have been derived from the experimental data and then fitted to the Cibulka, Singh, Redlich-Kister, and Nagata-Tamura equations, respectively. The binary subsystems were correlated by Redlich-Kister equation. For the system of 1,2,3,4-tetrahydronaphthalene + isopropylcyclohexane, the curve of the V-m(E) reveals a wing shape. The V-m(E) values are positive for the other two binary systems of 1,2,3,4-tetrahydronaphthalene + cyclopropanemethanol and isopropylcyclohexane + cyclopropanemethanol. While the value of Delta eta for all three binary systems is negative over the entire composition range. The results are interpreted with molecular interactions and structural effects.