1.need instructions as to replace fuel line ( have already purchased flexible fuel line) thanks elwyn

More detail is needed in your question i.e. make, model and year of vehicle tks

Hi,
Generally a bit of lube on the hose after cutting the end to a chisel-like angle, feeding it in through the wall of the tank and out the gas cap opening. Then cut straight to install the filter, ease filter and line into tank, connect to carb. Parts breakdown is here:
http://72.3.225.179/manuals/67453.pdf
Peace,
Clarke