  The predicted effects of final state interactions such as colour reconnection
are investigated by measuring properties of hadronic decays of W bosons,
recorded at a centre-of-mass energy of sqrt(s)=182.7 GeV in the OPAL detector
at LEP. Dependence on the modelling of hadronic W decays is avoided by
comparing W+W- -> qqqq events with the non-leptonic component of W+W- -> qqlnu
events.
  The scaled momentum distribution, its mean value, x_p, and that of the
charged particle multiplicity, n_ch, are measured and found to be consistent in
the two channels. The measured differences are:
  Diff(x_p) = +0.7 +- 0.8 +- 0.6 and
  Diff(n_ch) = (-0.09 +- 0.09 +-0.05)*10**-2.
  In addition, measurements of rapidity and thrust are performed for W+W- ->
qqqq events. The data are described well by standard QCD models and disfavour
one model of colour reconnection within the ARIADNE program. The current
implementation of the ELLIS-GEIGER model of colour reconnection is excluded. At
the current level of statistical precision no evidence for colour reconnection
effects was found in the observables studied. The predicted effect of colour
reconnection on OPAL measurements of M_W is also quantified in the context of
models studied.
