  The weak itinerant ferromagnetic behavior of Y$_2$Ni$_7$ is investigated
through magnetic, transport and calorimetric measurements. The low value of
saturation moment, large Rhodes-Wohlfarth ratio, large value of the linear term
in heat capacity and Fermi liquid like resistivity behavior with enhanced
electron-electron scattering contribution establish firmly the weak itinerant
ferromagetic nature of the sample. The critical exponents associated with the
paramagnetic to ferromagnetic transition are also investigated from
magnetization isotherms using modified Arrott plot, Kouvel-Fisher plot and
critical isotherm technique. The more accurate Kouvel-Fisher plot provides the
critical exponents to be $\beta$ = 0.306, $\gamma$ = 1.401 and $\delta$ =
5.578. These values are markedly different from the mean field values and
correspond closely to the two dimensional Ising spin system with long range
spin spin interaction.
