  We study the feasibility of a precise measurement of the mass of a 120 GeV
MSM Higgs boson through direct reconstruction of ZH->qqH events that would be
achieved in a future e+e- linear collider operating at a center-of-mass energy
of 500 GeV. Much effort has been put in a ``realistic simulation'' by including
irreducible and reducible backgrounds, realistic detector effects and
reconstruction procedures and sophisticated analysis tools involving Neural
Networks and kinematical fitting. As a result, the Higgs mass is determined
with a statistical accuracy of 50 MeV and the Z-Higgs Yukawa coupling measured
to 0.7%, assuming 500 fb^-1 of integrated luminosity.
